# InFuel vs FastFlex Fasting Tracker

The clearest difference is in-app purchases: InFuel at none against FastFlex Fasting Tracker's 2. FastFlex Fasting Tracker's advantage is update cadence (every 3 weeks vs every 10 months) and iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. FastFlex Fasting Tracker sells 2 in-app purchases, starting at $0.99 per month. InFuel asks for nothing beyond the download.

InFuel ships an update every 10 months, FastFlex Fasting Tracker every 3 weeks. The most recent releases landed on September 17, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | InFuel | FastFlex Fasting Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fastflex-fasting-tracker/id6756032313/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 2 MB | 44 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fishybear LLC](https://appshunter.io/developer/386484263) | [Orkhan Hasanbeck](https://appshunter.io/developer/1858104196) |

## What reviewers say

### InFuel

[App page](https://appshunter.io/ios/app/infuel/id6743775122)

**Features:** macOS Compatibility

**In-app purchases:** none


### FastFlex Fasting Tracker

[App page](https://appshunter.io/ios/app/fastflex-fasting-tracker/id6756032313)

This app helps you visualize your intermittent fasting progress with a unique visual tracker. It offers various fasting schedules, comprehensive tracking tools, and motivational milestones to keep you engaged. Designed for both beginners and experienced fasters, it focuses on privacy and a clean, intuitive interface.

**Highlights:** Visual progress tracking, Multiple fasting schedules, Customizable fasting durations, Fasting timer with milestones, Journal for insights, Weight tracking, Color-coded history

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastFlex Premium Monthly | $0.99 | per month |
| FastFlex Premium Annual | $9.99 | per year |


## Frequently asked questions

### Is InFuel free?

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

### Is FastFlex Fasting Tracker free?

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

### Do InFuel or FastFlex Fasting Tracker have ads?

Neither InFuel nor FastFlex Fasting Tracker shows ads.

### Which is updated more often, InFuel or FastFlex Fasting Tracker?

InFuel ships an update every 10 months, and FastFlex Fasting Tracker every 3 weeks. Most recently, InFuel was updated on September 17, 2026 and FastFlex Fasting Tracker on June 1, 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.*