# SmartLab35 vs Safelight Darkroom Timer

The clearest difference is in-app purchases: SmartLab35 at none against Safelight Darkroom Timer's 2. SmartLab35 also leads on update cadence (every 5 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Safelight Darkroom Timer sells 2 in-app purchases, starting at $2.99 per 7 days. SmartLab35 asks for nothing beyond the download.

SmartLab35 ships an update every 5 weeks, Safelight Darkroom Timer every 3 months. The most recent releases landed on November 12, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | SmartLab35 | Safelight Darkroom Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/safelight-darkroom-timer/id6766540911/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | — | Freemium |
| Size | 23 MB | 48 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SANTIAGO FRANCISCO RAMIREZ SONNTAG](https://appshunter.io/developer/1721708676) | [Nhu Nam Vo](https://appshunter.io/developer/1895450103) |

## What reviewers say

### SmartLab35

[App page](https://appshunter.io/ios/app/smartlab35/id6474482009)

**Features:** macOS Compatibility

**In-app purchases:** none


### Safelight Darkroom Timer

[App page](https://appshunter.io/ios/app/safelight-darkroom-timer/id6766540911)

This app helps photographers time their darkroom processes and calculate exposure changes. It offers customizable timers for exposure, development, and other stages, with options to save and revisit print setups. Advanced features for unlimited sessions and planning are available via subscription.

**Highlights:** Exposure calculation, Darkroom workflow timers, Print setup saving, F-stop table builder, Test strip functionality, Dodge & Burn planning (Pro)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Safelight Pro | $2.99 | per 7 days |
| Safelight Pro | $19.99 | per year |


## Frequently asked questions

### Is SmartLab35 free?

SmartLab35 is free to download, with no in-app purchases.

### Is Safelight Darkroom Timer free?

Safelight Darkroom Timer is free to download, with in-app purchases available.

### Do SmartLab35 or Safelight Darkroom Timer have ads?

Neither SmartLab35 nor Safelight Darkroom Timer shows ads.

### Which is updated more often, SmartLab35 or Safelight Darkroom Timer?

SmartLab35 ships an update every 5 weeks, and Safelight Darkroom Timer every 3 months. Most recently, SmartLab35 was updated on November 12, 2026 and Safelight Darkroom Timer on November 13, 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.*