RainbowSifter vs Zenoku
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
RainbowSifter
A color-matching puzzle game where players select six primary rainbow colors from an expanding selection. Drag colors to a target to build your rainbow. Long-press the target for additional options.
- Color selection
- Rainbow building
- Drag and drop interface
- Long press options
- Increasing difficulty
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A game where you pick the six major colors of the rainbow (red, orange, yellow, green, blue, and violet) out of the ever increasing choices. Drag the next color to the white target to add it to your rainbow. You can long press the white target for more options.
Zenoku
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Zenoku: Pure Sudoku. No Distractions. Dive into a beautifully simple and intuitive Sudoku experience designed for true puzzle enthusiasts. Zenoku offers a clean interface and smooth gameplay, letting you concentrate entirely on sharpening your mind and finding your flow. What makes Zenoku stand out? Pure, Uncluttered Design: A minimalist interface that keeps your focus firmly on the puzzle. Intuitive Gameplay: Easy to pick up and play, with controls that feel natural. Multiple Difficulty Levels: From beginner-friendly to expert challenges, there's always a perfect puzzle waiting for you. Harmonious & Relaxing: A serene environment to unwind and exercise your brain. Zenoku is your go-to app for genuine Sudoku fun. Download it once and experience Sudoku the way it was meant to be played – simple, engaging, and absolutely free from distractions.
Screenshots
Verdict
The clearest difference is device support: Zenoku at 2 against RainbowSifter's —. On price, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | RainbowSifter | Zenoku |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Every 9 months |
| Ads | — | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | — | iPhone, iPad — better |
| Requires iOS | 18.6 | 18.2 — better |
| Further details — not scored | ||
| Size | 8 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Robert Hennessy | Johan Karlsson |
In-app purchases
RainbowSifter
No in-app purchases
Zenoku
No in-app purchases









