# i自由 vs PassiveTrack

The clearest difference is iOS requirement: PassiveTrack at 15.1 against i自由's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. i自由 sells 1 one-off in-app purchase and PassiveTrack sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

i自由 ships an update every 6 days, PassiveTrack every 3 days. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | i自由 | PassiveTrack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 3 days** |
| Size | 39 MB | 38 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [利华 陈](https://appshunter.io/developer/1825131597) | [DMCS](https://appshunter.io/developer/1889106103) |

## What reviewers say

### i自由

[App page](https://appshunter.io/ios/app/i/id6748957414)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 会员资格（永久） | $7.99 | one-time |


### PassiveTrack

[App page](https://appshunter.io/ios/app/passivetrack/id6771440752)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PassiveTrack Pro | $4.99 | per month |


## Frequently asked questions

### Is i自由 free?

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

### Is PassiveTrack free?

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

### Do i自由 or PassiveTrack have ads?

Neither i自由 nor PassiveTrack shows ads.

### Which is updated more often, i自由 or PassiveTrack?

i自由 ships an update every 6 days, and PassiveTrack every 3 days. Most recently, i自由 was updated on October 1, 2026 and PassiveTrack on October 2, 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.*