# RunGap vs Z2/4×4 Trainer

The clearest difference is iOS requirement: RunGap at 16 against Z2/4×4 Trainer's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. RunGap sells 2 in-app purchases, starting at $4.99 per 3 months and Z2/4×4 Trainer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

RunGap ships an update every 2 weeks, Z2/4×4 Trainer every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RunGap | Z2/4×4 Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.9K ratings)](https://appshunter.io/ios/app/rungap-workout-data-manager/id534460198/reviews)** | — |
| Number of ratings | **5.9K** | — |
| Positive reviews | 77.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 5 MB |
| Requires iOS | **16** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [CTRL-N](https://appshunter.io/developer/534460201) | [Chenfei Chu](https://appshunter.io/developer/6776864992) |

## What reviewers say

### RunGap

[App page](https://appshunter.io/ios/app/rungap-workout-data-manager/id534460198)

Consolidate workout data from over 50 fitness services into one app. Access, share, and export your training history with detailed statistics, charts, and gear tracking. Integrates with popular devices and platforms.

**Highlights:** Syncs data from 50+ fitness services, Consolidates training history, Detailed statistics and charts, Interactive maps and activity details, Track shoe, bike, and gear usage, Geotag photos and videos

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quarterly Swag Bag | $4.99 | per 3 months |
| Annual Swag Bag | $14.99 | per year |

**What reviewers like**

- 🚀 Syncs data seamlessly
- 👍 Comprehensive data management
- 💡 Consolidates data from multiple sources
- 🚀 Efficient data transfer
- 👍 Great customer support

**What reviewers complain about**

- 🔒 Security concerns with login credentials
- 💰 Subscription required for full functionality
- 🐛 Inconsistent syncing and data transfer
- 🔒 Privacy concerns with data storage

**Reported bugs**

- App crashes or freezes
- Syncing issues with certain platforms
- Incorrect data transfer or formatting

**Requested features**

- Improved user interface and navigation
- Automatic background syncing
- Integration with more fitness platforms
- Offline data access and editing


### Z2/4×4 Trainer

[App page](https://appshunter.io/ios/app/z244-trainer/id6776864990)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Z2/4×4 Pro (Lifetime) | $14.99 | one-time |


## Frequently asked questions

### Is RunGap free?

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

### Is Z2/4×4 Trainer free?

Z2/4×4 Trainer is free to download, with in-app purchases available.

### Do RunGap or Z2/4×4 Trainer have ads?

Neither RunGap nor Z2/4×4 Trainer shows ads.

### Which is updated more often, RunGap or Z2/4×4 Trainer?

RunGap ships an update every 2 weeks, and Z2/4×4 Trainer every 3 weeks. Most recently, RunGap was updated on November 6, 2026 and Z2/4×4 Trainer on October 31, 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.*