# Blunami vs JustSize

The clearest difference is in-app purchases: Blunami at none against JustSize's 1. Blunami also leads on ratings volume (10 vs 1) and iOS requirement (13.0 vs 16.0). JustSize's advantage is update cadence (daily vs every 2 weeks) and rating (5.0 vs 4.7). On price, ads and device support there is nothing between them.

Both are free to download. JustSize sells 1 one-off in-app purchase. Blunami asks for nothing beyond the download.

JustSize holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Blunami has 10 ratings behind it against 1, so its average is the more settled of the two.

Blunami ships an update every 2 weeks, JustSize daily. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Blunami | JustSize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (10 ratings)](https://appshunter.io/ios/app/blunami/id6450242596/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justsize-compress-to-size/id6792161310/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 50 MB | 3 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BlueRail Trains](https://appshunter.io/developer/1108536202) | [Wenxiao Su](https://appshunter.io/developer/1531976265) |

## What reviewers say

### Blunami

[App page](https://appshunter.io/ios/app/blunami/id6450242596)

Control locomotives equipped with a specific DCC decoder using your mobile device. This application allows for seamless operation of your model trains.

**Highlights:** Locomotive control, DCC decoder compatibility, SoundTraxx Blunami support, Mobile operation

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

**In-app purchases:** none


### JustSize

[App page](https://appshunter.io/ios/app/justsize-compress-to-size/id6792161310)

Easily compress photos and videos to your desired file size without needing technical knowledge. This app offers presets for common platforms and warns you if quality will be compromised. It also provides tools for metadata management and format conversion, all processed privately on your device.

**Highlights:** Compress to target file size (MB/KB), Platform-specific presets, Quality warning before compression, 100% on-device processing, EXIF metadata viewer and remover, Image and video format conversion, Batch processing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Everything | $7.99 | one-time |


## Frequently asked questions

### Is Blunami free?

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

### Is JustSize free?

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

### Which has better reviews, Blunami or JustSize?

JustSize is rated higher. Blunami averages 4.7 out of 5 from 10 ratings, while JustSize averages 5.0 from 1 ratings.

### Do Blunami or JustSize have ads?

Neither Blunami nor JustSize shows ads.

### Which is updated more often, Blunami or JustSize?

Blunami ships an update every 2 weeks, and JustSize daily. Most recently, Blunami was updated on October 12, 2026 and JustSize on October 16, 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.*