# WeightUp vs Gain Weight

The clearest difference is update cadence: Gain Weight at daily against WeightUp's weekly. Gain Weight also leads on iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. WeightUp sells 2 in-app purchases, starting at $3.99 per 7 days and Gain Weight sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

WeightUp ships an update weekly, Gain Weight daily. The most recent releases landed on October 16, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | WeightUp | Gain Weight |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | — | Freemium |
| Size | 8 MB | 17 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Jimpei Yamamoto](https://appshunter.io/developer/1510733955) | [Moo & Company](https://appshunter.io/developer/1827801961) |

## What reviewers say

### WeightUp

[App page](https://appshunter.io/ios/app/weightup-weight-gain-tracker/id6753589816)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム1週間 | $3.99 | per 7 days |
| プレミアム1ヶ月 | $6.99 | per month |


### Gain Weight

[App page](https://appshunter.io/ios/app/gain-weight-stackcal/id6762064997)

This app helps users track calorie intake specifically for gaining weight and muscle mass. It offers quick meal logging via photo recognition and provides personalized targets based on user stats and goals. Data is kept private on the device with optional iCloud sync.

**Highlights:** Bulk-first calorie targets, AI-powered photo meal logging, One-gesture logging for weight and portions, Clear home screen with daily progress, Trend-based weight tracking, Privacy-focused, no account needed

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StackCal Pro 月額プラン | $9.99 | per month |
| StackCal Pro 年額プラン | $49.99 | per year |


## Frequently asked questions

### Is WeightUp free?

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

### Is Gain Weight free?

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

### Do WeightUp or Gain Weight have ads?

Neither WeightUp nor Gain Weight shows ads.

### Which is updated more often, WeightUp or Gain Weight?

WeightUp ships an update weekly, and Gain Weight daily. Most recently, WeightUp was updated on October 16, 2026 and Gain Weight on October 2, 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.*