# UnderForge vs Calorie Tracker

The clearest difference is update cadence: UnderForge at every 10 days against Calorie Tracker's every 2 months. UnderForge also leads on iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. UnderForge sells 3 in-app purchases, starting at $3.99 per 7 days and Calorie Tracker sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UnderForge ships an update every 10 days, Calorie Tracker every 2 months. Both last shipped on November 9, 2026.

## The numbers

| Metric | UnderForge | Calorie Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Size | 128 MB | 20 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Venture CO Group Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/6800294425) | [Mehmet Demir](https://appshunter.io/developer/1522952577) |

## What reviewers say

### UnderForge

[App page](https://appshunter.io/ios/app/underforge/id6758098630)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UnderForge Premium Weekly | $3.99 | per 7 days |
| UnderForge Premium Quarterly | $29.99 | per 3 months |
| UnderForge Premium Yearly | $89.99 | per year |


### Calorie Tracker

[App page](https://appshunter.io/ios/app/calorie-tracker-fitless/id6768085407)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FitLess Premium Weekly | $4.99 | per 7 days |
| FitLess Premium Monthly | $8.99 | per month |
| FitLess Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is UnderForge free?

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

### Is Calorie Tracker free?

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

### Do UnderForge or Calorie Tracker have ads?

Neither UnderForge nor Calorie Tracker shows ads.

### Which is updated more often, UnderForge or Calorie Tracker?

UnderForge ships an update every 10 days, and Calorie Tracker every 2 months. Most recently, UnderForge was updated on November 9, 2026 and Calorie Tracker on November 9, 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.*