# CarbFlow vs Fit2AI

The clearest difference is in-app purchases: CarbFlow at none against Fit2AI's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fit2AI sells 1 in-app purchase, starting at $9.99 per month. CarbFlow asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | CarbFlow | Fit2AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Size | 6 MB | 6 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [嘉琪 郑](https://appshunter.io/developer/1892992542) | [LIGHTOUCH K.K.](https://appshunter.io/developer/1708839957) |

## What reviewers say

### CarbFlow

[App page](https://appshunter.io/ios/app/carbflow/id6762150519)

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

**In-app purchases:** none


### Fit2AI

[App page](https://appshunter.io/ios/app/fit2ai/id6765814671)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fit2AI Pro | $9.99 | per month |


## Frequently asked questions

### Is CarbFlow free?

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

### Is Fit2AI free?

Fit2AI is free to download, with in-app purchases available.

### Do CarbFlow or Fit2AI have ads?

Neither CarbFlow nor Fit2AI shows ads.

### Which is updated more often, CarbFlow or Fit2AI?

CarbFlow ships an update every 3 days, and Fit2AI every 3 days. Most recently, CarbFlow was updated on October 31, 2026 and Fit2AI on October 31, 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.*