iPhone Screenshots


Join Katy Hearn and millions of women just like you, and begin your transformation today! With FIT by Katy, you'll enjoy Katy's daily updates (the Daily Katy), a community forum for challenge participants to share thoughts, photos, and encouragement with others like you, and a complete, interactive set of workouts to help you achieve your goals.

Join Katy's FIT FAM!
Love Katy's workouts and want to keep your transformation going? Become a member and receive Katy's Workout Generator with new, Katy-guided routines every time you shake your phone. Premium members also receive all of Katy's Seasonal Promos and additional premium discounts - more than $200 in annual savings!

Premium Membership: $18.99/mo
* All Seasonal Promos (a $400 value!)
* Workout Generator
* Exclusive premium discounts on gear, supplements, and more
* New features rolling out soon!

Basic Membership: $4.99/mo
* Workout Generator
* Discounts on gear, supplements, and more

FIT Fam memberships are one-month and renew each month unless cancelled at least 24-hours before the end of the current period. Payment will be charged to your iTunes Account at confirmation of purchase, and you can manage your subscription at any time by going to your Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable.

Terms of Service: https://www.katyhearnfit.com/terms-of-service
Privacy Policy: https://www.katyhearnfit.com/privacy-policy

What’s New

Version 2.3.0

Update time! Thanks to your feedback, we've been able to update and improve the FIT By Katy app to make it more reliable and an even better experience. We've been working on bug fixes and optimizing the workout videos so that you can keep sweating.

Love FIT by Katy? Rate us 5 stars and leave your feedback.

Ratings and Reviews

4.3 out of 5
530 Ratings

530 Ratings

jcrow1224 ,


I wrote my previous review below just shortly after purchasing the 2018 Spring Promo. Since then I have competed in the 2018 Summer Challenge and purchased the Workout Generator. I still love the app and use generator every time I go to the gym.
I do wish the workout generator had a feature that would allow you to indefinitely ignore a certain workout if you’re physically incapable of doing it so that it won’t pull that into your mix again. It seems like the “Choose Another” gets stuck on pulling in the same workouts over and over. For example, I probably had to randomize 20-25 times until it finally pulled in the cable hamstring curl I was looking for as part of my workout. Or, it would be so cool if you could scroll through a list and pick the combination of workouts you wanted instead of the random selection. I saw they are working on a way for the app to track amount of weight used as well, can’t wait!!! For a startup app I’ve been really impressed and can’t wait to see what new features come this year!!!

Spring 2018 Review:
Absolutely love the app! I purchased the spring promo workouts and I love the organized workouts and video access. Makes for an easy transition to the next workout. I only hope enhancements come in the future to note weight on each workout and hold your place as you complete the weeks and relaunch the app each time. Overall, this turned out to be a great app. Thank you so much Katy & Hayden!

nsfit ,

Good but could be better

I want to start off by saying that I absolutely love Katy and the empire she’s built. I’ve been following her on Instagram for awhile, which prompted me to get the app. The workouts are great, it’s easy to use (I have the basic package, broke college student here🙋🏼‍♀️). For the most part, there’s a little note below each of the video with more instructions, however, on many workouts, there’s not. I’m by no means new to the gym, and so it hasn’t been all that hindering to me, but I think that that could use some updating. Now for what might actually be a deal breaker for me: when choosing at home for the workout generator, it assumes that you have dumbbells and multiple kinds of resistance bands. I know that these aren’t expensive necessarily, but it’s tough to be in a dorm and try to make it work without these things. I have to do a lot of make-shifting to make it count. I wish they would make it so you could filter out workouts that require equipment you don’t have. Ex: I have a full set of “booty bands” (the looped ones) but not a long band. So if I could filter out the workouts to only include body weight and bands, it would literally be the perfect app.

Developer Response ,

Thank you or submitting your feedback, we are always hoping to improve the performance of the app for the users. We have taken note of these suggestions and are working diligently to get new features added in for our users!

Sweet n toxic ,

Loving this for the Challenge

So it’s my 6th challenge with Katy, And I have to say I do love having this app with all of the workouts and videos in one place. Prior are used to have to print out the workouts and make sure I brought my binder to the gym no more need to do that as everything is easily accessible on your phone. No more switching back and forth to Instagram to search hashtags if you’re unsure of the workout either.

Understanding this is brand new and I’m sure there are MANY changes to comer there are some things I do wish the app had; a spot to keep track of your weights/ reps, search bar for comments in the challenge forum,a longer timer for taking picks on your own,-‘d that the weeks don’t automatically switch on you until you’ve completed the entire week prior. Other than that it’s truly great! I love being able to check right in with Katy and having it log all my pictures as well as having her responses all in one spot.

If you’ve never done a challenge with her you’re truly missing out!


Undefined LLC
40.1 MB
Health & Fitness

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 12+ for the following:
Infrequent/Mild Sexual Content and Nudity
© Katy Hearn Fitness LLC
In-App Purchases
  1. Basic Edition $4.99
  2. Premium Edition $18.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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