Simple Fit vs Flex3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple Fit
Access qualified trainers and a unique exercise base to create personalized workout plans. Achieve your fitness goals with expert guidance and tailored programs.
- Qualified trainers and Fit-coaches
- Unique exercise base
- Individual training plans
- Goal-oriented coaching
- Home and gym workouts
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Simple Fit puts a personal trainer right in your pocket. Custom programs, live chat with your coach, and results you can actually see. No generic “one-size-fits-all” routines — just a plan built around your goals, experience, and equipment. WHAT'S INSIDE • A personal trainer online — up to 5× cheaper than an offline gym coach • Real-time chat with your trainer: ask, get an answer right away • An individual plan for your goal, not a preset from the internet • Train at home or in the gym — with any equipment, or none • Progress, stats, and reminders so you never quit YOUR GOAL, OUR PLAN • lose weight or build muscle • gain strength and endurance • recover after pregnancy or injury • simply stay in shape Beginner or seasoned athlete — your trainer adapts the load to you and guides you session by session, based on your real results. FOR TRAINERS Simple Fit means more clients and less routine. Coach your athletes online, move offline clients into the app, track their progress, and get reminders. Easy payouts and clear stats — earn from what you do best. Our mission is to bring the best trainers and the most driven athletes together on one platform, so everyone gets the most out of fitness. Learn more: simplefit.app Download Simple Fit and take a step toward a better you — today.
Flex3
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Flex3 is the go to app for all fitness trainer looking to enhance their clients' experience with classes. With over 80+ workouts with detailed instructions, Flex3 gives trainers and clients a rich set of easy to use features. Flex3 also aids progress tracking and helps solve consistency problems.Watch your clients' hard work pay off! Track their progress effortlessly through detailed metrics, and milestones. Celebrate achievements and stay focused on thier journey to a stronger and fitter.
Screenshots
Verdict
The clearest difference is ads: Flex3 at none against Simple Fit's shown. Flex3 also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Simple Fit ships an update every 3 weeks, Flex3 every 5 weeks. The most recent releases landed on September 20, 2026 and May 28, 2026 respectively.
| Parameter | Simple Fit | Flex3 |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 110 MB | 29 MB |
| Age rating | 17+ | 17+ |
| Developer | FITNESS I TOCHKA | Aravind Athreya |
In-app purchases
Simple Fit
No in-app purchases
Flex3
No in-app purchases









