Sesh Fitness: By Katy Hearn 12+

Home & Gym Workouts for Women

Undefined LLC

    • 4.8 • 5.3K Ratings
    • Free
    • Offers In-App Purchases

iPhone Screenshots


FIT by Katy is now Sesh Fitness App! As always, we provide a sustainable approach to exercise & nutrition to deliver a healthier lifestyle that you can maintain. With hundreds of exercise videos, personalized macro goals, thousands of community members & the ability to track your progress…you’ll get in shape, & stay in shape, for life. Start with our free 2-week program, just by downloading the app!

No matter your current fitness level or clothing size…you belong at Sesh Fitness. Our workout programs are tailored to fit YOU & will help you reach your goals from any starting point.
Every program is built by female CPT’s. The team of women behind Sesh also test every weight lifting program along with you! We believe in programming that works for women, built by women.
With over 40 weight lifting plans in a range of training styles, you will find what works for YOU. We also offer a glute-biased plan & a program built for postpartum women.

Included in all subscriptions is access to our Workout Generator. With infinite splits to keep things fresh, you’ll get an effective workout with no planning time required.
Choose home or gym for your workout & the body part you want to focus on…& voila! A custom, new strength training session every day with reps & sets already set for you.
Worried about not knowing how to do an exercise? Every movement in the app includes a video with detailed description so you worry less about form & more about progress.

Free to everyone in the app is our Macro Calculator. Start by entering your data & the calculator will give you customized macro goals. These work seamlessly with our weight lifting programs.
Daily check-ins to hold yourself accountable. This feature is your very own health journal. It’s a great place to track your progress over time
Exclusive access to our Community. These women will give you a helping hand when you need it & will give you a kick in the pants when you need that, too!

It is in our DNA to empower women to become the best versions of themselves.
We’ll help you retrain your brain on things like 1,200 calorie diets & weight lifting. You’ll get that what you really want is to lose fat & put on lean muscle while fueling your body.
The Sesh team knows what it’s like trying to juggle careers, kids, social lives & our health because…we’re women just like you! We will be supporting you every step of the way.

You can train with female certified personal trainers & nutrition experts to expedite your transformation. Through weekly check-ins, they’ll motivate you through the challenge, while providing help with things like your sleep, cardio, digestion, energy levels, food, & more!
Our challenges unlock more features like the chance to win cash prizes, & more.
We kick off new challenges every 8 weeks, so download the app, & follow us on social for updates.

We know that achieving health & happiness are life-long ventures, & we’re here to help you do that realistically & sustainably.
Join the members-only Sesh Fam group to get help when you need it, cheer others on, & hold yourself accountable.
Read our exclusive content with tips to keep you engaged. We develop unique content for everything from grocery lists, macro meal ideas, mindfulness help, form critiques, & more!

Subscription Pricing & Terms:
Free to download. Ongoing use requires a monthly membership. You will be charged through your App Store Account at confirmation of purchase. Subscriptions renew automatically unless canceled 24 hours prior to the end of the subscription period. Subscriptions can be managed by going to Account Settings. Refunds are not available once a purchase has been made. Read our full Terms of Service & our Privacy Policy

What’s New

Version 4.2.15

Improvements to support our next challenge

Ratings and Reviews

4.8 out of 5
5.3K Ratings

5.3K 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!

Mdc18 ,

Here since 2018

I started my first challenge ever when Katy Hearn still had printable PDF’s. I did the first challenge that ever rolled out with the Sesh app and it changed my life, formally known as “Fit By Katy”. This app has changed my life. If you’re wanting a workout program that is easy enough to follow through but hard enough to really challenge you and get you lasting results - this is it. The premium subscription gives you access to all past challenges and a workout generator for those days you just need a quick plan. With challenges, you can do coached or uncoached - giving you an easy check in process. The app has a macro calculator where you can calculate your macros too. And not to mention the support community behind this app - the fb group alone is enough of a reason to get this app!! The support is unwavering and you’ll never feel alone. Intimated by the gym? No problem. The app has a built in “at home” replica of the gym material so you can do solely at home, at gym, or switch it up as needed. Seriously this has everything you could ever need - workouts are geared towards women too so don’t be worried that this is a strict bulking program. You can choose your goal from lose weight, maintain and gain muscle too. Don’t let the pink pretty colors and layout fool you though - this app will get you right! Go ahead and check out the before and after pics and download now!

Developer Response ,

Thank you for this amazing review! We love being able to provide all the support and features you need that we can!

natasharomero ,


I am just finishing up my first 8 week coached challenge through this app and it has been life changing! The way I eat, see food i.e. relationship with food, move, and feel has all changed due to this app and the challenge. This app’s functionality is great and they are constantly updating and looking at their user’s needs and suggestions. I think this is amazing and there are many updates to come that I’m really excited for. If I wasn’t doing a challenge there are subscription options too, and you can get so much from those. This app and the Fit By Katy team are top-notch. If you want a healthier life style change and accountability, this super easy and excellent functioning app is where it is at! May Update- FBK started daily check in which has been awesome! At first there was issues but the team actually cares and worked hard to fix everything quickly! Now it is super reliable and a great way to track progress and stay accountable. They’re always making new changes and will soon be coming out with a different type of program I’m excited for! They’re always using evidence based plans and constantly upgrading to the best. I feel like they really take into account what their girls want in their reviews/surveys and the science that gets results and the best health possible. I’m so excited to keep going with this app/programs/community.

Developer Response ,

👏👏 This is what we love to hear, we're so glad we could help with your lifestyle change!

App Privacy

The developer, Undefined LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Financial Info
  • Contact Info
  • Identifiers
  • Usage Data
  • Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Health & Fitness
  • Location
  • Contact Info
  • User Content
  • Sensitive Info
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


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