Stack vs Gymnio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stack
This app helps users track their weightlifting progress with a focus on ease of use and data privacy. It allows for detailed logging of sets, exercise planning, and visual progress tracking without ads or intrusive notifications.
- Distraction-free lifting log
- Local-first data storage with optional iCloud sync
- Customizable splits and routines
- Extensive exercise library with muscle mapping
- Detailed per-set logging
- Plate calculator for real-world racks
- Progress visualization and trend analysis
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Less tapping. More time lifting. See how far you have come. Stack is a workout log for strength training. Walk in with a routine ready, keep your last session's numbers close and see your progress over time. Start free, with no account required. With Stack Pro, get a target for your next set, skip the plate math and repeat a set from your iPhone Lock Screen without reopening the app. KEEP YOUR WORKOUT MOVING Log weight and reps with controls made for the time between sets. Your previous session's numbers are prefilled, so you can pick up where you left off. Build routines, add your own exercises and train in pounds or kilograms. SEE WHAT YOUR WORK IS ADDING UP TO Revisit your workout history, follow strength trends and track personal records. Explore the muscle map to see which muscles your logged sets worked. Your workout log, history, basic trends and muscle map are free. GIVE YOUR NEXT SESSION A DIRECTION WITH PRO - Know what to lift next. Smart Targets suggest weight and reps based on your logged sets. - Keep logging from your Lock Screen or Dynamic Island. Repeat your previous set and add rest time on iPhone. - Load the bar without the math. See the plates to put on each side for your chosen weight. - Turn a weekly gap into a plan. Compare planned sets with your muscle targets, preview a routine change and save it when it fits your week. - See progress beyond the numbers. Compare progress photos and work toward your next max attempt with guided one-rep max testing. Pro also includes Gym Mode, suggested exercise replacements, extra themes and custom appearance controls. YOUR TRAINING, WITH YOU Log workouts offline. Export and import your training data, and choose optional iCloud sync. No account is needed to start training. Start with your next workout. Keep a record you can build on. STACK PRO Optional monthly or yearly subscription, or a lifetime purchase. Subscriptions renew automatically until cancelled. Manage or cancel your subscription in your App Store account settings. Lifetime is a one-time purchase. Terms of Service: https://stack.lauterstar.com/terms.html
Gymnio
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Built for people who actually lift. Not for people who talk about it. Log sets, reps, and weight in seconds. See your progress at a glance. And when you've been stuck at the same weight too long, Gymnio calls it out and tells you to go heavier. No account. No subscription. No ads. Ever. — TRACK WHAT MATTERS - Every set logged in seconds: weight, reps, date - Progress charts per exercise so you see what's actually working - Personal best badge when you hit a new record - Automatic nudge when it's time to increase the weight - Your dashboard, your way. Hide what you don't need. - Volume stats, total sets, your top lifts - Full strength training history by date - Build and manage your own exercise library - Reminders so you don't skip leg day - Dark Mode and Light Mode — NO BLOAT. JUST LIFTING. Most gym apps want you to scroll feeds, earn badges, and pay monthly. Gymnio doesn't. Log your workout, close the app, go lift more next time. — Your data never leaves your device. No login. No cloud. No tracking.
Screenshots
Verdict
The clearest difference is update cadence: Stack at every 10 days against Gymnio's every 2 months. Stack also leads on device support. On price, in-app purchases and iOS requirement 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.
Stack ships an update every 10 days, Gymnio every 2 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.
| Parameter | Stack | Gymnio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 days — better | Every 2 months |
| Ads | No | — |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | — |
| Requires iOS | 26.2 | 26.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Lauterstar Technologies, Inc | Slavka Polanova |
In-app purchases
Stack
No in-app purchases
Gymnio
No in-app purchases









