# Photo Sign vs ML Trainer

The clearest difference is price: Photo Sign at Free against ML Trainer's $0.99. Photo Sign also leads on update cadence (every 2 days vs every 55 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Photo Sign is free to download; ML Trainer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Photo Sign ships an update every 2 days, ML Trainer every 55 months. The most recent releases landed on October 25, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Photo Sign | ML Trainer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ml-trainer-make-training-data/id1573622903/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 55 months |
| Monetization | — | Paid |
| Size | 2 MB | 9 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AppTrix AB](https://appshunter.io/developer/1468876095) | [Casey Pollock](https://appshunter.io/developer/991679552) |

## What reviewers say

### Photo Sign

[App page](https://appshunter.io/ios/app/photo-sign/id1560510157)

**Features:** Vision Pro support

**In-app purchases:** none


### ML Trainer

[App page](https://appshunter.io/ios/app/ml-trainer-make-training-data/id1573622903)

Easily create training data for machine learning image classification models. Capture thousands of images with adjustable settings for speed and accuracy, then export them for use with popular development tools.

**Highlights:** Capture images for ML training data, Adjustable scan speed and frame count, Low light enhancement with flashlight, Export images to Photos app, Compatibility with CreateML, TensorFlow, Azure ML, Accuracy aids like crosshairs and guides

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Photo Sign free?

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

### Is ML Trainer free?

ML Trainer costs $0.99, with no in-app purchases.

### Do Photo Sign or ML Trainer have ads?

Neither Photo Sign nor ML Trainer shows ads.

### Which is updated more often, Photo Sign or ML Trainer?

Photo Sign ships an update every 2 days, and ML Trainer every 55 months. Most recently, Photo Sign was updated on October 25, 2026 and ML Trainer on November 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.*