# UnderForge vs Fit Planner

The clearest difference is in-app purchases: UnderForge at none against Fit Planner's 3. UnderForge also leads on ads (none vs shown) and update cadence (every 9 days vs every 2 months). On price and iOS requirement there is nothing between them.

Both are free to download. Fit Planner sells 3 in-app purchases, starting at $9.99 per 7 days. UnderForge asks for nothing beyond the download.

UnderForge ships an update every 9 days, Fit Planner every 2 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | UnderForge | Fit Planner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 2 months |
| Size | 126 MB | 30 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Venture CO Group Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/6800294425) | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) |

## What reviewers say

### UnderForge

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

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

**In-app purchases:** none


### Fit Planner

[App page](https://appshunter.io/ios/app/fit-planner-workout-tracker/id6759956657)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Plan | $9.99 | per 7 days |
| Premium Yearly | $49.99 | per year |
| Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is UnderForge free?

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

### Is Fit Planner free?

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

### Do UnderForge or Fit Planner have ads?

Fit Planner shows ads; UnderForge does not.

### Which is updated more often, UnderForge or Fit Planner?

UnderForge ships an update every 9 days, and Fit Planner every 2 months. Most recently, UnderForge was updated on October 13, 2026 and Fit Planner on October 7, 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.*