# TrueZone vs EndureIndex

The clearest difference is iOS requirement: TrueZone at 14.0 against EndureIndex's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. TrueZone sells 2 one-off in-app purchases and EndureIndex sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | TrueZone | EndureIndex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 72 MB | 8 MB |
| Requires iOS | **14.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Driftline ehf.](https://appshunter.io/developer/1574232641) | [Danilo Krautz](https://appshunter.io/developer/1875731224) |

## What reviewers say

### TrueZone

[App page](https://appshunter.io/ios/app/truezone/id1574232639)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Heart rate analysis | $5.99 | one-time |
| 10 fitness tests | $49.99 | one-time |


### EndureIndex

[App page](https://appshunter.io/ios/app/endureindex-training/id6760260948)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EndureIndex Pro Monthly | $1.99 | per month |
| EndureIndex Pro Yearly | $14.99 | per year |


## Frequently asked questions

### Is TrueZone free?

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

### Is EndureIndex free?

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

### Do TrueZone or EndureIndex have ads?

Neither TrueZone nor EndureIndex shows ads.

### Which is updated more often, TrueZone or EndureIndex?

TrueZone ships an update every 3 weeks, and EndureIndex every 3 weeks. Most recently, TrueZone was updated on October 6, 2026 and EndureIndex on October 3, 2026.

---

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