# Weight Diary vs lockstar

The clearest difference is in-app purchases: lockstar at none against Weight Diary's 2. lockstar also leads on update cadence (daily vs weekly). Weight Diary's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Weight Diary sells 2 in-app purchases, starting at $1.99 per month. lockstar asks for nothing beyond the download.

Weight Diary ships an update weekly, lockstar daily. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Weight Diary | lockstar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (40 ratings)](https://appshunter.io/ios/app/weight-diary-bmi-calculator/id1665619257/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 95.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 102 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OpenRhapsody](https://appshunter.io/developer/1648611308) | [JISU LEE](https://appshunter.io/developer/1864799952) |

## What reviewers say

### Weight Diary

[App page](https://appshunter.io/ios/app/weight-diary-bmi-calculator/id1665619257)

Easily log your weight, body fat percentage, and nutrition to track progress towards your health goals. Visualize your journey with intuitive graphs and a calendar view, and customize the app to suit your needs. Share your progress with others and stay motivated.

**Highlights:** Log weight, body fat, nutrition, activity, and mood, Calendar view for daily logging overview, Graphs for weekly, monthly, and yearly progress, Customizable logging fields, Data import from other health apps, Password protection for privacy, Push notification reminders

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $1.99 | per month |
| Remove Ads (Yearly) | $6.99 | per year |


### lockstar

[App page](https://appshunter.io/ios/app/lockstar/id6758002597)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Weight Diary free?

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

### Is lockstar free?

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

### Do Weight Diary or lockstar have ads?

Neither Weight Diary nor lockstar shows ads.

### Which is updated more often, Weight Diary or lockstar?

Weight Diary ships an update weekly, and lockstar daily. Most recently, Weight Diary was updated on October 24, 2026 and lockstar on October 19, 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.*