# Gravitus vs OOS

The clearest difference is in-app purchases: OOS at none against Gravitus's 17. OOS also leads on iOS requirement (12.4 vs 16.0). Gravitus's advantage is update cadence (every 8 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Gravitus sells 16 in-app purchases, starting at $3.99 per 7 days. OOS asks for nothing beyond the download.

Gravitus ships an update every 8 days, OOS every 3 months. The most recent releases landed on November 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Gravitus | OOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (3.4K ratings)](https://appshunter.io/ios/app/gravitus-gym-workout-tracker/id965383840/reviews)** | — |
| Number of ratings | **3.4K** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 months |
| Monetization | Freemium | — |
| Size | 55 MB | 42 MB |
| Requires iOS | 16.0 | **12.4** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Gravitus, Inc.](https://appshunter.io/developer/965383839) | [Lukasz Kmiecik](https://appshunter.io/developer/1676048515) |

## What reviewers say

### Gravitus

[App page](https://appshunter.io/ios/app/gravitus-gym-workout-tracker/id965383840)

This app helps you track and plan your weightlifting routines. It offers an extensive exercise database, community features, and detailed analytics to monitor your progress and maximize gains. Enjoy an ad-free experience with advanced tools for serious lifters.

**Highlights:** Advanced workout routines, Extensive exercise database with video demos, Community features for sharing and following, Detailed progress tracking and analytics, Workout planning and reminders, Apple Watch companion app, Dark Mode

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gravitus Pro | $3.99 | per 7 days |
| Monthly Supporter Subscription | $4.99 | per month |
| Gravitus Pro | $4.99 | per 7 days |
| Gravitus Pro | $6.99 | per month |
| Gravitus Pro | $7.99 | per month |
| Gravitus Pro | $9.99 | per month |
| Gravitus Pro | $11.49 | per month |
| Gravitus Pro | $11.49 | per month |
| Gravitus Pro | $12.99 | per month |
| Gravitus Pro | $12.99 | per month |
| Gravitus Pro | $49.99 | per year |
| Gravitus Pro | $59.99 | per year |
| Gravitus Pro | $59.99 | per year |
| Gravitus Pro | $71.99 | per year |
| Gravitus Pro | $79.99 | per year |
| Gravitus Pro | $79.99 | per year |

**What reviewers like**

- 🚀 Efficient tracking and logging
- 👍 User-friendly interface
- 🔥 Excellent for serious lifters
- 💪 Comprehensive exercise library
- 📈 Detailed progress tracking and analytics

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔒 Paywall for basic features
- ⏱️ Lack of customizable timers
- 🤷‍♂️ Inconsistent PR tracking

**Reported bugs**

- Workout data loss on app crashes
- Exercise search function not always working
- Inconsistent behavior when switching between WiFi and cellular

**Requested features**

- Apple Watch integration
- Ability to create and save custom workout templates
- More detailed volume and intensity tracking
- Improved syncing and data backup


### OOS

[App page](https://appshunter.io/ios/app/oos/id6446111586)

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

**In-app purchases:** none


## Frequently asked questions

### Is Gravitus free?

Gravitus is free to download, with in-app purchases available.

### Is OOS free?

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

### Do Gravitus or OOS have ads?

Neither Gravitus nor OOS shows ads.

### Which is updated more often, Gravitus or OOS?

Gravitus ships an update every 8 days, and OOS every 3 months. Most recently, Gravitus was updated on November 1, 2026 and OOS on October 9, 2026.

---

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