# Gain Weight vs FormLapse

Gain Weight and FormLapse are too close to call on the numbers: across 7 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Gain Weight sells 2 in-app purchases, starting at $9.99 per month and FormLapse sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Gain Weight ships an update daily, FormLapse every 2 days. The most recent releases landed on September 23, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Gain Weight | FormLapse |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 17 MB | 3 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Moo & Company](https://appshunter.io/developer/1827801961) | [Shuhei Yamamoto](https://appshunter.io/developer/1896725589) |

## What reviewers say

### 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 |


### FormLapse

[App page](https://appshunter.io/ios/app/formlapse/id6780141102)

Effortlessly track your body transformation with daily photos that automatically align to create a smooth time-lapse. Build a consistent habit with reminders and view your progress alongside weight trends. All your data stays private on your device.

**Highlights:** Auto-aligned time-lapse creation, Daily photo habit builder, Weight logging and trend overlay, On-device data privacy, Face blurring for sharing, Multiple purchase plans

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| スタンダード | $2.99 | one-time |
| プレミアムへアップグレード | $4.99 | one-time |
| プレミアム | $7.99 | one-time |


## Frequently asked questions

### Is Gain Weight free?

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

### Is FormLapse free?

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

### Do Gain Weight or FormLapse have ads?

Neither Gain Weight nor FormLapse shows ads.

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

Gain Weight ships an update daily, and FormLapse every 2 days. Most recently, Gain Weight was updated on September 23, 2026 and FormLapse on September 3, 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.*