Comparison

Achromator vs Timer4

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

Head to head
About

Achromator

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Ever wondered why everyone keeps going on about the beautiful colors of the sunset? Having trouble seeing if a tomato is ripe? What about bananas? Or maybe you just find the world to colorful and want to keep it a little more black-and-white for the day? Achromator translates all color from the phone video stream into unique animated textures. It encodes all hues and shades - without loss of information! It even keeps much of the structure found in color, like mixing, gradual blending and complementary hues. The pattern generator can be adjusted to your personal preference - pattern size, speed and selection of individual colors.

About

Timer4

This app offers a unique timer experience by automatically adjusting countdown durations based on your device's orientation. Simply rotate your phone to switch between preset intervals with a physics-driven interface and immersive haptic feedback.

Highlights
  • Physics-based interface
  • Instant duration switching via rotation
  • Smart motion detection
  • Immersive haptic feedback
  • Customizable timer presets
  • Intuitive orientation control
Features
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Keep your four go-to timers just a turn away. Study and breaks, cooking and workouts: with Timer4, you don’t have to set the same times over and over. ◆ Turn to switch timers Each side of your iPhone holds a timer: 5 minutes, 10 minutes, 30 minutes, or 1 hour. Turn to the one you need and tap Start. In Rotate view, the cards move with gravity. If you’d rather not turn your phone, switch Timer View to List and pick from all four timers on one screen. ◆ Timer sets for every routine Save up to 10 sets for studying, cooking, workouts, and more. Each set holds four timers. Swipe left or right to jump to the set you need. ◆ All four at a glance on big screens On wider screens, such as iPad, all four timers appear on one screen. No turning needed. Just tap Start on the timer you want. ◆ Start right from your Home Screen Tap a timer in the widget to open the app and start the countdown. Each widget can show its own timer set. ◆ Check and control it from the Lock Screen See the time left on the Lock Screen, and pause, resume, or stop without opening the app. On iPhone models with the Dynamic Island, you can check and control the timer there too. ◆ Make every timer your own Name each timer, set its length, and change the screen and border colors. Show the numbers in the font you like. Only one timer runs at a time. Whether you’re settling in to focus or taking a quick break, keep the times you need ready in Timer4. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Achromator3 screens
Timer44 screens

Verdict

The call

The clearest difference is in-app purchases: Achromator at none against Timer4's 1. Achromator also leads on iOS requirement (17.6 vs 26.1). On price, update cadence, ads and device support 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. Timer4 sells 1 one-off in-app purchase. Achromator asks for nothing beyond the download.

UpkeepUpdate frequency

Achromator ships an update monthly, Timer4 every 4 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
Achromator versus Timer4: the parameters behind the verdict, then further details
ParameterAchromatorTimer4
PriceFreeFree
Rating—3.8 (5 ratings) — better
Positive reviews—37.5% of reviews
Number of ratings—5 — better
Update frequencyMonthlyEvery 4 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.6 — better26.1
Further details — not scored
Size1 MB4 MB
Age rating4+4+
DeveloperHANS-JURGEN GRAF GROTEGoateraction

In-app purchases

None

Achromator

No in-app purchases

1 purchases

Timer4

One-time1
  • Lifetime Access$4.99

Questions

Is Achromator free?
Achromator is free to download, with no in-app purchases.
Is Timer4 free?
Timer4 is free to download, with in-app purchases available.
Do Achromator or Timer4 have ads?
Neither Achromator nor Timer4 shows ads.
Which is updated more often, Achromator or Timer4?
Achromator ships an update monthly, and Timer4 every 4 weeks. Most recently, Achromator was updated on October 25, 2026 and Timer4 on October 30, 2026.

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