Best Permanent Hair Straightening near me in St. Catharines - Niagara
One venue offering Permanent Hair Straightening in St. Catharines - Niagara See map
Call to book

Hair Creations
5205 King St, Beamsville, ON L0R 1B3, Canada
+1 905-708-4247+1 905-708-4247Call to bookPermanent Hair Straightening
Highlights
Blow Dry
Hair Extensions

ClaraDerma+
300 Bunting Rd Unit 12, St. Catharines, ON L2M 7X3, Canada
+1 905-397-7075+1 905-397-7075Call to bookCryotherapy
Body Scrub
Body Wrap
Spa Package

LA Laser Niagara
4190 Kalar Rd, Niagara Falls, ON L2H 1S8, Canada
+1 905-358-8924+1 905-358-8924Call to bookFace Waxing
Full Body Waxing
Leg Waxing
Brazilian Waxing

Pain Free Laser and Hair Restoration Clinic
6100 Thorold Stone Rd Unit 13, Niagara Falls, ON L2J 1A3, Canada
+1 289-296-5511+1 289-296-5511Call to bookFace Waxing
Leg Waxing
Men's Waxing
Back Waxing

Palazzo Salon & Spa
91 E Main St #1, Welland, ON L3B 3W5, Canada
+1 905-735-4025+1 905-735-4025Call to bookFish Pedicure
Gel Nails
Manicure
Nail Art

Storm Hair Group
84 Geneva St, St. Catharines, ON L2R 4M8, Canada
+1 905-685-0797+1 905-685-0797Call to bookThreading
Acne Facial
Bridal Makeup
Facial

KAB.BARBER SHOP
3704 E ST, Stevensville, ON L0S 1S0, Canada
+1 647-774-4133+1 647-774-4133Call to bookBeard Trimming
Men's Shaving
Head Shave
Men's Haircut

Fort Erie Salon and Barber
Ferndale Ave, Fort Erie, ON L2A 5C7, Canada
+1 647-218-3431+1 647-218-3431Call to bookBeard Trimming
Men's Haircut
Men's Shaving
Head Shave

Valvano Salon Spa
134 Niagara St, St. Catharines, ON L2R 4L4, Canada
+1 905-684-5580+1 905-684-5580Call to bookPermanent Hair Straightening
Perm
Blow Dry
Hair Extensions

Blackbeards Barber Shop
324 St Paul St, St. Catharines, ON L2R 3M9, Canada
+1 905-682-9591+1 905-682-9591Call to bookBeard Trimming
Head Shave
Men's Haircut
Men's Shaving

Tootzie's Tune-Up, Hair & Maintenance
153 Scott St Unit 1, St. Catharines, ON L2N 1H3, Canada
+1 905-934-4899+1 905-934-4899Call to bookBeard Trimming
Men's Shaving
Head Shave
Men's Haircut

Katie Elizabeth Salon
274 Fourth Ave Unit 2, St. Catharines, ON L2R 6P9, Canada
+1 905-380-9802+1 905-380-9802Call to bookPermanent Hair Straightening
Highlights
Keratin Treatment
Women's Haircut

Dollface Make-Up & Hair
8664 Dogwood Cres, Niagara Falls, ON L2H 0K9, Canada
+1 905-351-6767+1 905-351-6767Call to bookFacial
Makeup Service
Threading
Bridal Makeup

Welland Barbershop And Shave Parlour
322 Thorold Rd, Welland, ON L3C 3W6, Canada
+1 905-329-4479+1 905-329-4479Call to bookBeard Trimming
Men's Shaving
Head Shave
Men's Haircut

Pretty and Co.
101 Hannover Dr, St. Catharines, ON L2W 1A3, Canada
+1 905-324-6480+1 905-324-6480Call to bookPermanent Hair Straightening
Blow Dry
Hair Treatment
Hair Weaves

The Hair Gallery Salon & Spa
6026 Main St, Niagara Falls, ON L2G 5Z9, Canada
+1 905-357-4966+1 905-357-4966Call to bookPermanent Hair Straightening
Curly Haircut
Hair Braiding
Hair Colouring

Anger & Artistry
146 James St, St. Catharines, ON L2R 2N4, Canada
+1 905-380-4786+1 905-380-4786Call to bookPermanent Hair Straightening
Balayage
Hair Braiding
Hair Colouring

The Cutting Edge
1062 Garrison Rd, Fort Erie, ON L2A 1N9, Canada
+1 905-994-7424+1 905-994-7424Call to bookMakeup Service
Threading
Facial

Nurse. Aesthetic & Holistic. Laser Hair Removal Niagara
4725 Dorchester Rd Unit B1, Niagara Falls, ON L2E 0A8, Canada
+1 289-214-8882+1 289-214-8882Call to bookBrazilian Waxing
Sugaring
Back Waxing
Face Waxing

Rooted Hair Studio
792 Canboro Rd, Fenwick, ON L0S 1C0, Canada
+1 905-246-4187+1 905-246-4187Call to bookPermanent Hair Straightening
Women's Haircut
Blow Dry
Hair Extensions

Annnissi Beauty Salon
80 King St Apartment 6, St. Catharines, ON L2R 7G1, Canada
+1 647-614-2376+1 647-614-2376Call to bookPermanent Hair Straightening
Women's Haircut
Blow Dry
Hair Extensions

Rock & Roll Hair Studio
46A Front St S, Thorold, ON L2V 1W8, Canada
+1 905-397-5872+1 905-397-5872Call to bookPermanent Hair Straightening
Women's Haircut
Hair Colouring
Hair Extensions

michelle on lake
231 Lake St Front Unit, St. Catharines, ON L2R 5Z5, Canada
+1 905-347-1558+1 905-347-1558Call to bookPermanent Hair Straightening
Perm
Blow Dry
Hair Extensions

Nino D'ambra Hair and Aesthetics
231 Garrison Rd, Fort Erie, ON L2A 1M8, Canada
+1 905-871-6886+1 905-871-6886Call to bookPermanent Hair Straightening
Hair Colouring
Hair Treatment
Hair Weaves

Blu Hair Studio
209 Glenridge Ave, St. Catharines, ON L2R 4K8, Canada
+1 289-668-0996+1 289-668-0996Call to bookThreading
Henna Tattoos
Makeup Service

Oracle Hair Studio
5014 Serena Dr Unit 2, Beamsville, ON L3J 0T2, Canada
+1 289-566-8555+1 289-566-8555Call to bookMakeup Service
Facial
Threading

York Barber's Lounge
1397 York Rd, St. Davids, ON L0S 1P0, Canada
+1 905-262-0990+1 905-262-0990Call to bookPermanent Hair Straightening
Children's Haircut
Hair Braiding
Hair Colouring

Gloss Hair Makeup
16 Thorold Rd, Welland, ON L3C 3T3, Canada
+1 289-820-5151+1 289-820-5151Call to bookMakeup Service
Bridal Makeup
Facial

Endless Beauty By Hope
341 Ridgeway Rd, Crystal Beach, ON L0S 1B0, Canada
+1 289-673-5551+1 289-673-5551Call to bookBody Scrub
Body Wrap
Infrared Sauna
Sauna

Hairquarters Unisex
600 Ontario St, St. Catharines, ON L2N 7A7, Canada
+1 905-937-5244+1 905-937-5244Call to bookPermanent Hair Straightening
Locs
Blow Dry
Hair Extensions

West 139 Salon
139 Martindale Rd, St. Catharines, ON L2S 2X5, Canada
+1 905-684-2659+1 905-684-2659Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Videl's Hairstyling
131 Queenston St, St. Catharines, ON L2R 2Z6, Canada
+1 905-685-0197+1 905-685-0197Call to bookPermanent Hair Straightening
Perm
Blow Dry
Hair Extensions

Mike's Hair Studio
327 Bowen Rd, Fort Erie, ON L2A 2Z1, Canada
+1 289-438-2276+1 289-438-2276Call to bookBeard Trimming
Men's Shaving
Head Shave
Men's Haircut

Hue Beauty Salon
567 Carlton St, St. Catharines, ON L2M 4X8, Canada
+1 905-667-9488+1 905-667-9488Call to bookThreading
Facial
Makeup Service

Alessandro Salon
125 Ontario St, St. Catharines, ON L2R 5J8, Canada
+1 905-682-3321+1 905-682-3321Call to bookPermanent Hair Straightening
Hair Colouring
Blow Dry
Hair Extensions

Salon Thairapy
6251 O'Neil St Unit 3, Niagara Falls, ON L2J 1M6, Canada
+1 289-296-6422+1 289-296-6422Call to bookPermanent Hair Straightening
Children's Haircut
Blow Dry
Hair Extensions

Salon Gratitude
320 Ridge Rd N, Ridgeway, ON L0S 1R0, Canada
+1 905-246-2743+1 905-246-2743Call to bookPermanent Hair Straightening
Children's Haircut
Curly Haircut
Hair Braiding

Signatures Hair & Aesthetics
497 Vine St, St. Catharines, ON L2M 3T2, Canada
+1 905-646-7031+1 905-646-7031Call to bookPermanent Hair Straightening
Women's Haircut
Hair Colouring
Hair Treatment

Patricia's Hair Salon
294 Lincoln Rd W, Crystal Beach, ON L0S 1B0, Canada
+1 905-894-1591+1 905-894-1591Call to bookPermanent Hair Straightening
Balayage
Children's Haircut
Curly Haircut

Siren Beauty
4523 Ontario St, Beamsville, ON L0R 1B5, Canada
+1 289-887-6353+1 289-887-6353Call to bookMakeup Service
Dermaplaning
Microdermabrasion
Threading

Xcess Hair by Anita
4465 Drummond Rd, Niagara Falls, ON L2E 6C5, Canada
+1 905-380-4744+1 905-380-4744Call to bookPermanent Hair Straightening
Hair Colouring
Hair Treatment
Hair Weaves

Scizzions Salon & Spa Destination
300 Bunting Rd, St. Catharines, ON L2M 7X3, Canada
+1 905-646-7793+1 905-646-7793Call to bookThreading
Bridal Makeup
Men's Facial
Facial

Grottola's Salon & Spa
7805 Lundy's Ln, Niagara Falls, ON L2H 1H3, Canada
+1 905-354-4228+1 905-354-4228Call to bookPermanent Hair Straightening
Hair Braiding
Hair Colouring
Hair Treatment

Shear Perfection by Lisa
176 Foxtail Ave, Welland, ON L3C 7J7, Canada
+1 905-246-8772+1 905-246-8772Call to bookPermanent Hair Straightening
Hair Braiding
Blow Dry
Hair Extensions

The Curly Alchemist
6 Merritt Rd, Fonthill, ON L0S 1E4, Canada
+1 905-733-0991+1 905-733-0991Call to bookPermanent Hair Straightening
Hair Braiding
Hair Colouring
Balayage

Tia's Hair Salon by Blanca
95 Niagara Blvd, Fort Erie, ON L2A 3G5, Canada
+1 289-690-4382+1 289-690-4382Call to bookMakeup Service
Facial

Styled by Shinae
21 Front St S #202, Thorold, ON L2V 1W8, Canada
+1 289-214-2442+1 289-214-2442Call to bookPermanent Hair Straightening
Balayage
Curly Haircut
Hair Braiding

Bella's Salon Boutique
195 Denistoun St, Welland, ON L3C 6P1, Canada
+1 905-380-8805+1 905-380-8805Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Prism Hair Company
28 James St, St. Catharines, ON L2R 5B8, Canada
(833) 428-9638(833) 428-9638Call to bookPermanent Hair Straightening
Curly Haircut
Blow Dry
Hair Extensions

West Hair Co.
265 King St Unit 3, Port Colborne, ON L3K 4G8, Canada
+1 289-241-0553+1 289-241-0553Call to bookPermanent Hair Straightening
Women's Haircut
Blow Dry
Hair Extensions

Salon Sara Lina
13 Duke St, St. Catharines, ON L2R 5W1, Canada
+1 289-362-4410+1 289-362-4410Call to bookPermanent Hair Straightening
Children's Haircut
Curly Haircut
Hair Braiding

Haus of Marleau
17 Lock St, St. Catharines, ON L2N 5B6, Canada
+1 905-329-2074+1 905-329-2074Call to bookPermanent Hair Straightening
Curly Haircut
Blow Dry
Hair Extensions

Lydz Hair Studio
6423 Lundy's Ln, Niagara Falls, ON L2G 1T8, Canada
+1 289-296-2323+1 289-296-2323Call to bookPermanent Hair Straightening
Children's Haircut
Curly Haircut
Hair Braiding

Sunrise Hair Design and Boutique
33 Rosedale Ave, St. Catharines, ON L2P 1Y6, Canada
+1 905-980-1573+1 905-980-1573Call to bookThreading
Bridal Makeup
Makeup Service

Posh Salon & Esthetics
569 Ontario St, St. Catharines, ON L2N 4N4, Canada
+1 905-937-4247+1 905-937-4247Call to bookDermaplaning
Threading
Acne Facial
Bridal Makeup

Steelo's Studio
224 Glenridge Ave, St. Catharines, ON L2T 3J8, Canada
+1 905-323-8997+1 905-323-8997Call to bookPermanent Hair Straightening
Women's Haircut
Blow Dry
Hair Extensions

John Eric & Company for Hair Inc
6150 Valley Wy unit 110, Niagara Falls, ON L2E 1Y3, Canada
+1 289-296-3580+1 289-296-3580Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Linda Esthetic Studio
4528 Frances Crescent, Beamsville, ON L3J 0E8, Canada
+1 905-563-9577+1 905-563-9577Call to bookFull Body Waxing
Brazilian Waxing
Hollywood Waxing
Sugaring

Spirit Of Beauty
73 Bunting Rd, St. Catharines, ON L2P 3G8, Canada
+1 647-219-7446+1 647-219-7446Call to bookBrow Lamination
Eyebrow Threading
Eyebrow Tinting
Eyebrow Waxing

Confident Image Chez France
36 Hiscott St Unit 100B, St. Catharines, ON L2R 1C8, Canada
+1 905-931-0686+1 905-931-0686Call to bookDermaplaning
Microdermabrasion
Acne Facial
Chemical Peel

Spacifix Esthetics Studio
401 Ridge Rd N, Fort Erie, ON L0S 1R0, Canada
+1 905-894-2713+1 905-894-2713Call to bookChemical Peel
Facial Extractions
Threading
Makeup Service

Octane Hair Lounge
267 1/2 Welland Ave, St. Catharines, ON L2R 2L8, Canada
+1 905-397-5121+1 905-397-5121Call to bookPermanent Hair Straightening
Curly Haircut
Hair Extensions
Balayage

Textures Hair Salon
6080 McLeod Rd, Niagara Falls, ON L2G 7T4, Canada
+1 905-931-5993+1 905-931-5993Call to bookMakeup Service
Threading

Sharlene's Organic Salon
75 Hwy 20 W, Fonthill, ON L0S 1E0, Canada
+1 905-328-0552+1 905-328-0552Call to bookFacial
Makeup Service

Fringe Hair And Skin Group
53 Queen St, St. Catharines, ON L2R 5G8, Canada
+1 905-687-8478+1 905-687-8478Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Color By Kellie
4661 Queen St, Niagara Falls, ON L2E 2L9, Canada
+1 289-214-3548+1 289-214-3548Call to bookPermanent Hair Straightening
Keratin Treatment
Perm
Women's Haircut

Natural Touch Aesthetics
7 Valvano Ct, St. Catharines, ON L2W 1C2, Canada
+1 905-988-1817+1 905-988-1817Call to bookBrazilian Waxing
Hollywood Waxing
Sugaring
Back Waxing

Girasole Salon & Spa
5248 Drummond Rd, Niagara Falls, ON L2E 6E7, Canada
+1 905-374-3370+1 905-374-3370Call to bookPermanent Hair Straightening
Keratin Treatment
Blow Dry
Hair Extensions

Black Diamond Hair Studio -
350 Walden Blvd, Fort Erie, ON L2A 1R9, Canada
+1 905-994-0707+1 905-994-0707Call to bookPermanent Hair Straightening
Balayage
Children's Haircut
Curly Haircut

Michael Of London Hair Salon
101 Lakeport Rd, St. Catharines, ON L2N 7L7, Canada
+1 905-646-4700+1 905-646-4700Call to bookPermanent Hair Straightening
Balayage
Children's Haircut
Hair Colouring

Maria Delduca Hair and Makeup Artistry
5974 Morrison St, Niagara Falls, ON L2E 7H6, Canada
+1 905-351-7242+1 905-351-7242Call to bookPermanent Hair Straightening
Wig Installation
Blow Dry
Hair Extensions

Tre Capelli Hairstyling
210 Glendale Ave, St. Catharines, ON L2T 3Y6, Canada
+1 905-684-0760+1 905-684-0760Call to bookPermanent Hair Straightening
Children's Haircut
Curly Haircut
Blow Dry

Lachau
6301 Regional Rd 57, Niagara Falls, ON L2J 1A6, Canada
+1 905-358-6866+1 905-358-6866Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Adelle's Hair Studio
Academy Plaza, 4520 Ontario St #3, Beamsville, ON L0R 1B5, Canada
+1 289-566-8404+1 289-566-8404Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Continental Hair Salon
486 Grantham Ave, St. Catharines, ON L2M 3J7, Canada
+1 905-646-7260+1 905-646-7260Call to book
Beauty by Tara Niagara
4025 Dorchester Rd, Niagara Falls, ON L2E 6N1, Canada
+1 905-359-6427+1 905-359-6427Call to bookHollywood Waxing
Brazilian Waxing
Back Waxing
Bikini Waxing

Rapunzel's
376 Mary St, Niagara-on-the-Lake, ON L0S 1J0, Canada
+1 905-468-2503+1 905-468-2503Call to bookPermanent Hair Straightening
Children's Haircut
Curly Haircut
Hair Braiding

MillionHairs
4347 Simcoe St, Niagara Falls, ON L2E 1T5, Canada
+1 416-333-7020+1 416-333-7020Call to bookPermanent Hair Straightening
Hair Weaves
Keratin Treatment
Women's Haircut

Squire Men's Hairstyling
184 Scott St, St. Catharines, ON L2N 1H1, Canada
+1 905-685-3614+1 905-685-3614Call to bookBeard Trimming
Men's Shaving
Head Shave
Men's Haircut

Sense Of Beauty Spa and Brow Bar
8023 Lundy's Ln, Niagara Falls, ON L2H 1H3, Canada
+1 905-353-1000+1 905-353-1000Call to bookBody Scrub
Body Wrap
Sauna
Spa Package

Hair Trends
49 Clarence St, Port Colborne, ON L3K 3G1, Canada
+1 905-835-2125+1 905-835-2125Call to bookPermanent Hair Straightening
Hair Colouring
Blow Dry
Hair Extensions

Salon Tranquility
Inside the Palazzo beauty suites, 6080 McLeod Rd, Niagara Falls, ON L2G 7T4, Canada
+1 905-650-2874+1 905-650-2874Call to bookMakeup Service
Threading

Hypnotyc Hair Lounge
1627 Niagara Stone Rd Box 1100, Virgil, ON L0S 1T0, Canada
+1 905-468-4888+1 905-468-4888Call to bookThreading
Bridal Makeup
Makeup Service
Men's Facial

Tangles & Fades
4666 Queen St, Niagara Falls, ON L2E 2L8, Canada
+1 289-296-2037+1 289-296-2037Call to bookPermanent Hair Straightening
Keratin Treatment
Blow Dry
Hair Extensions

Jo's Hair Fashion
447 Niagara St, Welland, ON L3C 1L6, Canada
+1 905-735-9476+1 905-735-9476Call to bookPermanent Hair Straightening
Perm
Wig Installation
Women's Haircut

HQ Studio - Hairquarters
285 Geneva St, St. Catharines, ON L2N 2G1, Canada
+1 905-935-3317+1 905-935-3317Call to bookPermanent Hair Straightening
Wig Installation
Blow Dry
Hair Extensions

Nicky's Hair & Makeup Studio
6255 Huggins St #6, Niagara Falls, ON L2J 2K8, Canada
+1 905-651-8850+1 905-651-8850Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Renee's Hair Design
522 Lake St, St. Catharines, ON L2N 4H4, Canada
+1 905-935-6191+1 905-935-6191Call to bookPermanent Hair Straightening
Hair Extensions
Balayage
Children's Haircut

Salon Carrizz
8100 Post Rd, Niagara Falls, ON L2H 2L3, Canada
+1 905-327-7338+1 905-327-7338Call to bookThreading
Makeup Service
Permanent Hair Straightening FAQs
Permanent hair straightening, also known as thermal reconditioning or Japanese straightening, is a chemical process that alters the structure of your hair to make it straight for long periods of time. First, chemical relaxants are applied to your hair to break down its natural bonds. Then your hair is straightened using heat and neutralized to lock in the new shape, leaving you with straight, sleek hair.
After getting a permanent hair straightening treatment, you'll enjoy long-lasting straight hair, reduced styling time, and improved manageability. It eliminates frizz and creates a smooth, sleek appearance. The treatment is well-suited for individuals with curly, wavy, or frizzy hair who want straight hair. Permanent hair straightening works best on healthy hair, so consult with your stylist to check that your hair is in good condition for the treatment.
When performed by a skilled professional, permanent hair straightening is safe. However, the chemicals involved can lead to dryness, brittleness, and potentially hair breakage if your hair isn't cared for properly during and after the treatment. Some people may also have an allergic reaction to the chemicals used. Consult with your stylist first to make sure you understand the process and potential risks.
Permanent hair straightening can last anywhere from 4-6 months, depending on your hair type and how fast it grows. To maintain your straightened hair for as long as possible, use hair care products like sulfate-free shampoos and conditioners, avoid chlorine and saltwater, and get regular touch-ups at the salon every few months as your hair grows out.
Yes – but you should wait at least two weeks after the straightening treatment before coloring your hair, to avoid potential damage and over-processing. As for styling, you can still use styling tools, but keep heat exposure to a minimum to avoid drying out your hair.
To choosing the perfect salon or stylist for permanent hair straightening, you need to research the treatment beforehand and ask your stylist the right questions. Look for a salon with positive reviews, especially for hair straightening treatments. Arrange a consultation before booking your appointment, where you can ask about your stylist's experience, what products they use, and their approach to hair care following the treatment. You'll know that you've found a good stylist if they prioritise your hair's health and can confidently answer all of your questions.
Book your next permanent hair straightening appointment in St. Catharines - Niagara with Fresha
Here at Fresha, we want to make your life simpler. So we've searched out all the best hair spots in St. Catharines - Niagara. Browse through our collection, and if you find a place that takes your fancy, you can compare price lists, reviews and treatments. Once you've selected your preferred hair salon, just pick a time and confirm your appointment. Forward thinking from us and straightforward for you.
And the outlook’s looking fine in your area. We may not be able to predict the weather in St. Catharines - Niagara, but Fresha can find you the best hair spots to spend a rainy day. Finding your next hair, massage and aesthetics appointment will be an absolute breeze. There’s everything on offer. So you can feel your best, come rain or shine.
Relax in the chair while the experts relax your hair. Permanent straightening can take up to 2 hours 30 minutes, but can give you smooth, sleek locks for up to 6 months.
A chemical solution is worked through the hair, which reconfigures the hair's proteins. A neutralizer is then added, making sure the hair stays in its straight new shape. Chemical hair straightening and hair rebonding start at $150 in St. Catharines - Niagara. They'll typically last until your hair grows out, so it's a long-term solution for a sleeker look. Leave unruly kinks and frizzy curls behind and book into one of the top-rated salons nearby with the Fresha mobile app.
With 1 billion appointments under our belt, Fresha is your go-to booking platform for self-care. And with over 130,000 global businesses powered by our software every single day, we’re the number one authority in salon and clinic management too. Our reach spans 120 countries around the world. So you can even book yourself a slice of self-care when you're abroad. Or when you're closer to home, take your pick from best hair places in St. Catharines - Niagara, Canada. Don’t forget, we love hearing your feedback, so email us at hello@fresha.com any time. This could be the start of a great partnership.
Also Available in St. Catharines - Niagara

Available on
Booking app for customers
Book unforgettable beauty and wellness experiences with the Fresha mobile app - the best way to discover top-rated salons and spas
Get the app
Available on
Business app for professionals
Get started with the Fresha for professionals and never miss an opportunity to connect with customers and build your business
Get the app