Comparison

SmartLab35 vs Safelight Darkroom Timer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SmartLab35

Features
Read full description

With the innovative photo enlarger, you can create prints from your film negatives in a completely new way. This is possible for colour and black and white photos. In black and white mode, you can set an exposure time of up to 999 seconds. You can set the intensity of the enlarger to up to -4.0 f-stops. For multi-grade paper, you can select the gradation from 00.0 to 5.0. Use the function buttons to control the enlarger. Use the FOCUS light to adjust the sharpness of your image. Use the SAFE light to insert the paper. Start and pause the exposure with the centre button. In colour mode, you can set an exposure time of up to 999 seconds. You can control the colour gradation of your image by setting the intensity of the individual colour channels. In the options menu, you can choose between CMY and RGB colour systems. Control the enlarger with the function buttons. You can use the FOCUS light to adjust the sharpness of your image. Start and pause the exposure with the centre button.

About

Safelight Darkroom Timer

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
Read full description

Calculate exposure changes, time your darkroom workflow and keep the print setups you want to revisit. • Use Focus, Expose and Process timers with large controls, display themes, optional haptics and sound. • Build an f-stop table with 1/4 or 1/3 stop steps, send a result to the timer or run a test strip. • Save and revisit up to three print sessions for free, including paper, filter grade, developer and notes. Time the exposure, development, stop bath, fix and optional wash stages. • Optional Safelight Pro subscriptions unlock unlimited sessions, advanced stop steps, Dodge & Burn planning, memory banks, run plans and CSV/Text export and sharing. The app interface is available in English and Vietnamese. Important: A phone screen is not guaranteed safe for every photographic paper or film. Test your own materials and darkroom conditions. Privacy Policy: https://hearthmesa.com/apps/safelight/privacy Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SmartLab354 screens
Safelight Darkroom Timer4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
SmartLab35 versus Safelight Darkroom Timer: the parameters behind the verdict, then further details
ParameterSmartLab35Safelight Darkroom Timer
PriceFreeFree
Rating—4.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 5 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size23 MB48 MB
Age rating4+4+
DeveloperSANTIAGO FRANCISCO RAMIREZ SONNTAGNhu Nam Vo

In-app purchases

None

SmartLab35

No in-app purchases

2 purchases

Safelight Darkroom Timer

Subscriptions2
  • Safelight Pro3 Days trial$2.997 Days
  • Safelight Pro3 Days trial$19.991 Year

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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