# Sikku: One Line — One line. Every cell. In order

> One line. Every cell. In order (iPhone/iPad app by Diogo Resende Rainho.)

- Source: https://appshunter.io/ios/app/sikku-one-line/id6803914911 (this page in markdown: same URL + `.md`)
- Developer: [Diogo Resende Rainho](https://appshunter.io/developer/6802587266)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 2 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China), Mexican Spanish
- Released: 2026-09-11
- Data updated: 2026-09-14
- User reviews in markdown: https://appshunter.io/ios/app/sikku-one-line/id6803914911/reviews.md

## What is Sikku?

Draw one unbroken line from 1 to the last number. Reach the numbers in order. Fill every open cell.

Three rules. That's the whole game.

150 puzzles across six chapters, every one hand-picked rather than generated on the spot. The ramp is deliberate: First Light teaches the line on small boards, and by Singular you are on a seven-by-seven full of walls where exactly one route works and you have to convince yourself it does.

• 150 puzzles — the first 50 free
• Six chapters, each in its own colours
• A best time and a flawless badge for every level
• A hint when you are stuck. It costs the badge, nothing else
• Progress follows you across devices through iCloud
• Plays entirely offline
• No ads, no tracking, no account, no subscription

Chapters three to six open with a single one-time purchase.

The sound is synthesised rather than sampled: one note per cell climbing a pentatonic scale, so a long clean run sounds like a phrase instead of a click track. Turn it off if you would rather think in silence.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| All 150 levels | $3.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-11

No release notes.

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## More apps by Diogo Resende Rainho

- [Mittari: Tally Counter](https://appshunter.io/ios/app/mittari-tally-counter/id6802587264)
- [Tulos: Score Keeper](https://appshunter.io/ios/app/tulos-score-keeper/id6803385919)
- [Kirjo: Color Sort Puzzle](https://appshunter.io/ios/app/kirjo-color-sort-puzzle/id6804496471)
- [Helmi: Match Three](https://appshunter.io/ios/app/helmi-match-three/id6805095998)
- [Cruzadas: Portuguese Crossword](https://appshunter.io/ios/app/cruzadas-portuguese-crossword/id6808655962)

All apps by Diogo Resende Rainho: https://appshunter.io/developer/6802587266

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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 2026-09-14.*