# AI Calorie Tracker vs FastFlow

The clearest difference is in-app purchases: AI Calorie Tracker at none against FastFlow's 2. AI Calorie Tracker also leads on update cadence (weekly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. FastFlow sells 2 in-app purchases, starting at $2.99 per month. AI Calorie Tracker asks for nothing beyond the download.

AI Calorie Tracker ships an update weekly, FastFlow every 4 months. The most recent releases landed on August 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | AI Calorie Tracker | FastFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Size | 0 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [masaki matsushita](https://appshunter.io/developer/1622331042) | [Renzo Ohhama](https://appshunter.io/developer/1812551739) |

## What reviewers say

### AI Calorie Tracker

[App page](https://appshunter.io/ios/app/ai-calorie-tracker-scanner/id6748591752)

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

**In-app purchases:** none


### FastFlow

[App page](https://appshunter.io/ios/app/fastflow/id6755752536)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastFlow Premium - Monthly | $2.99 | per month |
| FastFlow Premium - Yearly | $22.99 | per year |


## Frequently asked questions

### Is AI Calorie Tracker free?

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

### Is FastFlow free?

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

### Do AI Calorie Tracker or FastFlow have ads?

Neither AI Calorie Tracker nor FastFlow shows ads.

### Which is updated more often, AI Calorie Tracker or FastFlow?

AI Calorie Tracker ships an update weekly, and FastFlow every 4 months. Most recently, AI Calorie Tracker was updated on August 23, 2026 and FastFlow on September 8, 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.*