Comparison

Stack vs Gymnio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Gymnio

Easily log your weightlifting sets, reps, and weight. Visualize your progress with charts and get nudges to increase your weight. Track your strength training history and manage your exercise library without any ads or subscriptions.

Highlights
  • Log sets, reps, and weight
  • Progress charts per exercise
  • Personal best badges
  • Automatic weight increase nudges
  • Strength training history
  • Custom exercise library
  • No account, subscription, or ads
Read full description

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

Stack4 screens
Gymnio4 screens

Verdict

The call

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, rating, ratings volume and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Stack against 5.0 for Gymnio. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Stack ships an update every 10 days, Gymnio every 2 months. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Stack versus Gymnio: the parameters behind the verdict, then further details
ParameterStackGymnio
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 10 days — betterEvery 2 months
AdsNo—
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad — better—
Requires iOS26.226.0 — better
Further details — not scored
Size22 MB1 MB
Age rating4+4+
DeveloperLauterstar Technologies, IncSlavka Polanova

In-app purchases

None

Stack

No in-app purchases

None

Gymnio

No in-app purchases

Questions

Is Stack free?
Stack is free to download, with no in-app purchases.
Is Gymnio free?
Gymnio is free to download, with no in-app purchases.
Which has better reviews, Stack or Gymnio?
Stack and Gymnio are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Which is updated more often, Stack or Gymnio?
Stack ships an update every 10 days, and Gymnio every 2 months. Most recently, Stack was updated on November 5, 2026 and Gymnio on October 31, 2026.

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