# Stack Up: Ring Sort — Sort and merge colorful rings

> Sort and merge colorful rings (iPhone/iPad app by Celal Sahin ALTINISIK.)

- Source: https://appshunter.io/ios/app/stack-up-ring-sort/id6827255154 (this page in markdown: same URL + `.md`)
- Developer: [Celal Sahin ALTINISIK](https://appshunter.io/developer/6813080796)
- Category: Games, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 108 MB
- Languages: American English
- Released: 2026-11-06
- Data updated: 2026-11-13

## What is Stack Up?

Stack Up! is a calm and addictive ring sorting game. Stack rings of the same color on the pegs; when a slot fills with 8 matching rings they merge into a higher number. Reach targets from 1 to 100, unlock new slots and collect ring styles: donuts, jewel rings, lifebuoys, hex nuts, pizzas and buttons. Shuffle, Undo and Hint boosters help when you get stuck. Play with one hand, and you can play offline too.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Is Stack Up safe?

Not enough ratings yet to assess Stack Up.

## Is Stack Up legit?

Stack Up: Ring Sort appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Stack Up is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.0.4 — 2026-11-11

Smaller app size for a faster download.
Game music now pauses while an ad is playing.
Minor fixes and improvements.

### 1.0.3 — 2026-11-09

New info screen when a reward video can't load, with tips for VPN and offline play. The late game is more challenging: more numbers come into play from the 12th slot on. Bug fixes.

### 1.0.2 — 2026-11-08

Improved ad loading and bug fixes. Refreshed tutorial visuals.

### 1.0.1 — 2026-11-06

No release notes.

## More apps by Celal Sahin ALTINISIK

- [Worm Way: Gummy Puzzle](https://appshunter.io/ios/app/worm-way-gummy-puzzle/id6813080794)
- [Paint Island](https://appshunter.io/ios/app/paint-island/id6822042320)

All apps by Celal Sahin ALTINISIK: https://appshunter.io/developer/6813080796

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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 2026-11-13.*