# ZgzEnBici vs Shadow Tracker

The clearest difference is update cadence: Shadow Tracker at every 6 weeks against ZgzEnBici's every 6 months. Shadow Tracker also leads on iOS requirement (13.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

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

ZgzEnBici ships an update every 6 months, Shadow Tracker every 6 weeks. Both last shipped on October 12, 2026.

## The numbers

| Metric | ZgzEnBici | Shadow Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Size | 5 MB | 43 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pedro Leon](https://appshunter.io/developer/975324262) | [Shadow Stealth](https://appshunter.io/developer/1191830166) |

## What reviewers say

### ZgzEnBici

[App page](https://appshunter.io/ios/app/zgzenbici/id1114194519)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shadow Tracker

[App page](https://appshunter.io/ios/app/shadow-tracker/id1214364915)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ZgzEnBici free?

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

### Is Shadow Tracker free?

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

### Do ZgzEnBici or Shadow Tracker have ads?

Neither ZgzEnBici nor Shadow Tracker shows ads.

### Which is updated more often, ZgzEnBici or Shadow Tracker?

ZgzEnBici ships an update every 6 months, and Shadow Tracker every 6 weeks. Most recently, ZgzEnBici was updated on October 12, 2026 and Shadow Tracker on October 12, 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.*