Achromator vs Timer4
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
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.
- Physics-based interface
- Instant duration switching via rotation
- Smart motion detection
- Immersive haptic feedback
- Customizable timer presets
- Intuitive orientation control
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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
Verdict
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
Both are free to download. Timer4 sells 1 one-off in-app purchase. Achromator asks for nothing beyond the download.
Achromator ships an update monthly, Timer4 every 4 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.
| Parameter | Achromator | Timer4 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.8 (5 ratings) — better |
| Positive reviews | — | 37.5% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Monthly | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 — better | 26.1 |
| Further details — not scored | ||
| Size | 1 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | HANS-JURGEN GRAF GROTE | Goateraction |
In-app purchases
Achromator
No in-app purchases
Timer4
- Lifetime Access$4.99








