# Thirty Five mm vs Lab Assistant

The clearest difference is in-app purchases: Thirty Five mm at none against Lab Assistant's 1. Thirty Five mm also leads on iOS requirement (15.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Lab Assistant sells 1 one-off in-app purchase. Thirty Five mm asks for nothing beyond the download.

Thirty Five mm ships an update every 3 weeks, Lab Assistant every 5 weeks. The most recent releases landed on December 13, 2025 and July 22, 2026 respectively.

## The numbers

| Metric | Thirty Five mm | Lab Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 36 MB | 4 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jan Loehr](https://appshunter.io/developer/1462575568) | [Jack Kroll](https://appshunter.io/developer/1638376186) |

## What reviewers say

### Thirty Five mm

[App page](https://appshunter.io/ios/app/thirty-five-mm/id6739161477)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lab Assistant

[App page](https://appshunter.io/ios/app/lab-assistant-darkroom-timer/id6754861810)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | one-time |


## Frequently asked questions

### Is Thirty Five mm free?

Thirty Five mm is free to download, with no in-app purchases.

### Is Lab Assistant free?

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

### Do Thirty Five mm or Lab Assistant have ads?

Neither Thirty Five mm nor Lab Assistant shows ads.

### Which is updated more often, Thirty Five mm or Lab Assistant?

Thirty Five mm ships an update every 3 weeks, and Lab Assistant every 5 weeks. Most recently, Thirty Five mm was updated on December 13, 2025 and Lab Assistant on July 22, 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.*