# Chronodev - Darkroom Timer — Wi-fi-powered enlarger timer

> HomeKit-enabled enlarger timer for iPhone and iPad darkroom use. (iPhone/iPad app by Kevin Olmats.)

- Source: https://appshunter.io/ios/app/chronodev-darkroom-timer/id6478027671 (this page in markdown: same URL + `.md`)
- Developer: [Kevin Olmats](https://appshunter.io/developer/1480968856)
- Category: Photo & Video, Utilities
- Price: Free
- Rating: 4.50/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: English
- Released: 2024-07-17
- Data updated: 2026-06-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/chronodev-darkroom-timer/id6478027671/reviews.md

## What is Chronodev?

Transform your iPhone into an enlarger timer using Chronodev. Chronodev uses HomeKit-enabled wall plugs and lightbulbs to control your enlarger and safelights. Secondhand enlarger timers can be expensive and hard to find. This one costs the price of a wi-fi wall plug.

- Control your enlarger and safelight with your iPhone or iPad
- Expose prints accurately using the HomeKit-enabled timer
- Manual enlarger control for focusing
- Use the metronome for dodging and burning
- Adjust times using EV stops
- Automatically create test strips with incremental exposures, and keep track of exposure times using a handy graph
- Automatically turn your safelight off when exposing/focusing
- Voice control support for hands-free development
- Safe to use in black and white darkrooms when using iOS's built-in red color filter

A HomeKit-enabled wall plug and/or lightbulb is required to use all features of this app. Some features (like a basic timer and EV stop calculations) are available without a HomeKit-enabled device.

## Key features

- iPhone/iPad enlarger timer
- HomeKit device control
- Manual enlarger focusing
- Metronome for dodging/burning
- EV stop time adjustments
- Automatic test strip creation
- Voice control support

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/chronodev-darkroom-timer/id6478027671/reviews.md

### 4/5 — Easy to use and it works!

*2024-09-15*

Really like the app.  I paired it with a Meross Wi-Fi smart plug (outdoor version) and the set up took 5 minutes with my apple Home Network.  The app is simple and straightforward.  Here are a couple of constructive critiques and a few wishlist upgrades:
1.  Need to add 1/10s of a second.
2.  ± ev adjustment button needs to be more prominent / larger.
3.  Screen brightness constantly changing, although it never appeared to fog my paper.
4.  Addition of dodge/burn times (building a sequence)
5.  Memory of sequence / ability to add notes
6.  Multi channel for split printing

Looking forward to continued use!

### 5/5 — Great

*2024-08-22*

This is a really useful addition to my dark room toolkit

## Frequently asked questions about Chronodev

### What is Chronodev used for?

Chronodev transforms your iPhone or iPad into an enlarger timer for darkroom printing. It allows you to control your enlarger and safelight using HomeKit-enabled devices.

### Do I need special hardware to use Chronodev?

Yes, a HomeKit-enabled wall plug and/or lightbulb is required to use all features of Chronodev. However, some basic timer functions and EV stop calculations are available without a HomeKit device.

### How accurate is Chronodev for exposures?

Chronodev allows you to expose prints accurately using its HomeKit-enabled timer. It also supports adjusting times using EV stops and can automatically create test strips with incremental exposures.

### Can Chronodev be used for dodging and burning?

Yes, Chronodev includes a metronome feature that can be used for dodging and burning techniques during the printing process.

### Is Chronodev safe for black and white darkrooms?

Chronodev is safe to use in black and white darkrooms, especially when utilizing iOS's built-in red color filter. It also features automatic safelight control, turning it off during exposure or focusing.

### Does Chronodev have ads?

No, Chronodev does not contain advertisements. It is a free application that offers its features without interruption from ads.

### What devices does Chronodev support?

Chronodev is supported on iPhone and iPad devices. It was last updated on August 13, 2024, with version 1.0.1.

### What is the age rating for Chronodev?

Chronodev has an age rating of 4+. This indicates it is suitable for users of most ages, with no mature content.

## Version history (last 2 releases)

### 1.0.1 — 2024-08-13

- Bug fixes

### 1.0 — 2024-07-17

No release notes.

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## More apps by Kevin Olmats

- [Pupl](https://appshunter.io/ios/app/pupl/id1532249007)

All apps by Kevin Olmats: https://appshunter.io/developer/1480968856

## Related topics

[darkroom timer](https://appshunter.io/ios/topics/darkroom-timer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-07.*