# 50 GYM vs Gravity 21

The clearest difference is review sentiment: Gravity 21 at 100% against 50 GYM's 82%. Gravity 21 also leads on iOS requirement (13.4 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

50 GYM ships an update every 2 months, Gravity 21 every 5 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 50 GYM | Gravity 21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (29 ratings)](https://appshunter.io/ios/app/50-gym/id1408009578/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 82.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 59 MB | 29 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FORMULA OOO](https://appshunter.io/developer/1530797836) | [Fitbase](https://appshunter.io/developer/1530906929) |

## What reviewers say

### 50 GYM

[App page](https://appshunter.io/ios/app/50-gym/id1408009578)

Stay updated with fitness center news and class schedules. Receive timely notifications about schedule changes and special offers.

**Highlights:** News updates, Class schedule, Schedule change notifications, Special offers

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Gravity 21

[App page](https://appshunter.io/ios/app/gravity-21/id1668987927)

Manage your fitness club memberships and class schedules. Book group sessions, receive workout reminders, and track your membership validity. Stay updated with your fitness journey.

**Highlights:** View workout schedules, Book group training sessions, Receive workout reminders, Track membership expiry, Manage club services

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 50 GYM free?

50 GYM is free to download, with no in-app purchases.

### Is Gravity 21 free?

Gravity 21 is free to download, with no in-app purchases.

### Do 50 GYM or Gravity 21 have ads?

Neither 50 GYM nor Gravity 21 shows ads.

### Which is updated more often, 50 GYM or Gravity 21?

50 GYM ships an update every 2 months, and Gravity 21 every 5 weeks. Most recently, 50 GYM was updated on November 6, 2026 and Gravity 21 on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*