GymMatrix AI vs Fallow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GymMatrix AI
This AI-powered fitness app allows voice-controlled logging of workout sets, generating personalized training programs, and tracking progress. It offers smart exercise substitutions, set tracking, and weekly insights to help users achieve their fitness goals.
- Voice-first workout logging
- AI workout generator
- Smart exercise swap
- Set tracking with progress visualization
- Progressive overload coaching
- Weekly AI insights and reports
- Calorie burn estimates
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GymMatrix AI is a voice-first workout tracker that lets you log sets without touching your phone. Just hold the mic and say "bench 225 8" — the AI handles the rest. Built for real gym sessions where your hands are chalked up and your phone is sitting on a bench. Tap or talk, your choice. VOICE LOGGING Hold the button, say your exercise, weight, and reps in natural speech. The AI understands casual gym talk — "two plates for five" becomes Back Squat, 225 lbs, 5 reps. Works even better with AirPods in loud gyms. AI WORKOUT GENERATOR Answer 5 quick questions about your experience, schedule, and equipment. The AI builds a complete weekly program tailored to your goals. Don't like it? Regenerate or edit before saving. SMART EXERCISE SWAP Missing a piece of equipment? Tap swap on any exercise and get 3 AI-suggested alternatives that hit the same muscles. SET TRACKING Visual progress dots show exactly where you are. Three sets of bench? Watch the dots fill as you go. Progress bar tracks your entire session. PROGRESSIVE OVERLOAD COACHING When you've been hitting the same weight consistently, the app nudges you to add 5 lbs or an extra rep. Simple, data-driven progression. WEEKLY AI INSIGHTS Every week, the AI analyzes your training and generates a report: what went well, what to improve, muscle group balance, and a specific tip for next week. CALORIE BURN ESTIMATES Real-time calorie tracking that factors in your body weight, the load lifted, and exercise type. Heavy squats burn more than light curls — the math reflects that. BODY WEIGHT TRACKING Log your weight daily with a trend chart that shows your progress over weeks and months. Goal tracking tells you if you're on pace. 150+ EXERCISES Comprehensive library covering chest, back, legs, shoulders, arms, core, and conditioning. Every exercise has voice aliases so the AI recognizes however you say it. WORKOUT SUMMARY End your session and see the full recap: total volume, calories burned, personal records, and difficulty breakdown. CUSTOM ROUTINES Build your own split or choose from 5 preset programs including Upper/Lower, Push/Pull/Legs, Full Body, Body Part Split, and Glute & Tone. SHARING Brag and share your lifts with friends. Hold each other accountable and share your goal achieving lifts directly from the app. All your data stays on your device. No account required. No ads. Just you and the iron. Development in progress heavily, submit feedback and see your feature requests come to life! Terms of Use: https://sites.google.com/view/gymmatrix-terms Privacy Policy: https://sites.google.com/view/gymtracerprivacypolicy/home
Fallow
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Fallow helps you cut back on weed without white-knuckling it. Instead of all or nothing, it puts a little more time between seshes each day, at a pace you set, and lets you decide what to do when the timer runs out. THE GROWING BREAK Tell Fallow how long you go between seshes right now. That's your starting break. Each on-pace day stretches it a little (5%, with a small minimum), so the gap grows gradually. When the timer runs out, it's your call. A sesh after the break, or a pass, counts as on pace. Going a little early just slows today's stretch; your break never shrinks. PASSES Timer's up and you're good? Tap "I'm good" to log a pass. Passes restart the timer, count as on pace, and a run of them adds a bonus stretch right away. Time you hold past the end of your break (Break+) counts too. T-BREAKS Planning a pause? Pick a 48-hour, 7-day or 28-day T-break. Fallow counts the days, shows notes on changes people commonly report along the way, and if you lapse, the count keeps going: a lapse isn't a reset. When you're done, the return plan brings you back at a longer break than before. RULES THAT FIT YOUR LIFE Add optional rules around the timer: - Not before: nothing before a time you pick, and it can move later as you keep it. - Off days: choose weekdays that stay off. - Max per day: once you hit it, the timer holds until tomorrow. THE DAY BAR One glance shows your whole day: breaks, seshes, passes and Break+ time, color-coded, with a legend underneath. A LIVING PLANT AND YOUR STASH Your plant grows from your breaks, never from seshes. Passes, on-pace days and kept off days help it grow through its stages; harvests cure and land in your Stash, where each one unzips to reveal a strain name. Earn specimens for your Herbarium along the way. None are earned by having a sesh. THE JOURNAL Every sesh and pass in one place, with stats, notes and history you can edit or back-date. A weekly reflection is written on-device by Apple Intelligence where available, so it never leaves your phone. WIDGETS, LIVE ACTIVITY AND DYNAMIC ISLAND See your timer on the Home Screen, Lock Screen and Dynamic Island. Log a pass or start a sesh right from a widget. DISCREET MODE On by default. Notifications, widgets, the Lock Screen, the Live Activity and the app switcher just say "Timer". Switch to a neutral app icon if you like. FACE ID LOCK Lock Fallow behind Face ID so your Journal stays yours. YOUR SESHES STAY ON YOUR IPHONE No account. No ads. Your seshes and notes stay on your device; anonymous usage stats (which screens you open) are optional and can be turned off in Settings. Fallow is a pacing tool for adults 21+. It doesn't give medical advice and isn't a treatment program. If you're worried about your use, talk to a professional you trust.
Screenshots
Verdict
The clearest difference is in-app purchases: Fallow at none against GymMatrix AI's 2. GymMatrix AI's advantage is update cadence (every 5 days vs every 2 weeks) and iOS requirement (14.0 vs 26.4). On price, ads 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. GymMatrix AI sells 2 in-app purchases, starting at $2.99 per month. Fallow asks for nothing beyond the download.
GymMatrix AI ships an update every 5 days, Fallow every 2 weeks. Both last shipped on October 31, 2026.
| Parameter | GymMatrix AI | Fallow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 26.4 |
| Further details — not scored | ||
| Size | 31 MB | 9 MB |
| Age rating | 4+ | 17+ |
| Developer | Alex Tudor | Outsource Wisely LLC |
In-app purchases
GymMatrix AI
- GymTracer Pro Monthly7 Days trial$2.991 Month
- GymTracer Pro Yearly7 Days trial$19.991 Year
Fallow
No in-app purchases









