# Fasting Tracker vs Shifting Source

The clearest difference is in-app purchases: Shifting Source at none against Fasting Tracker's 1. Shifting Source also leads on update cadence (every 9 days vs every 2 months). Fasting Tracker's advantage is iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Fasting Tracker sells 1 one-off in-app purchase. Shifting Source asks for nothing beyond the download.

Fasting Tracker ships an update every 2 months, Shifting Source every 9 days. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Fasting Tracker | Shifting Source |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 5 MB | 9 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Manas Protim Das](https://appshunter.io/developer/1874045189) | [Hejlsvig Consulting AB](https://appshunter.io/developer/1895103789) |

## What reviewers say

### Fasting Tracker

[App page](https://appshunter.io/ios/app/fasting-tracker-free-fast/id6773323644)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter | $4.99 | one-time |


### Shifting Source

[App page](https://appshunter.io/ios/app/shifting-source/id6789093040)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fasting Tracker free?

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

### Is Shifting Source free?

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

### Do Fasting Tracker or Shifting Source have ads?

Neither Fasting Tracker nor Shifting Source shows ads.

### Which is updated more often, Fasting Tracker or Shifting Source?

Fasting Tracker ships an update every 2 months, and Shifting Source every 9 days. Most recently, Fasting Tracker was updated on October 7, 2026 and Shifting Source on October 15, 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.*