# Achtung Duo vs Aurora Stack Ball Sort Puzzle

The clearest difference is price: Aurora Stack Ball Sort Puzzle at Free against Achtung Duo's $1.99. Aurora Stack Ball Sort Puzzle also leads on rating (5.0 vs 4.1) and update cadence (weekly vs fortnightly). Achtung Duo's advantage is ratings volume (25 vs 1). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Aurora Stack Ball Sort Puzzle is free to download; Achtung Duo costs $1.99 up front. Achtung Duo sells 3 one-off in-app purchases and Aurora Stack Ball Sort Puzzle sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Aurora Stack Ball Sort Puzzle holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Achtung Duo has 25 ratings behind it against 1, so its average is the more settled of the two.

Achtung Duo ships an update fortnightly, Aurora Stack Ball Sort Puzzle weekly. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Achtung Duo | Aurora Stack Ball Sort Puzzle |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.1 (25 ratings)](https://appshunter.io/ios/app/achtung-duo/id495887070/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aurora-stack-ball-sort-puzzle/id6756080317/reviews)** |
| Number of ratings | **25** | 1 |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 38 MB | 3 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ALENTENZA SL.](https://appshunter.io/developer/1882412926) | [Heorhii Kozlovskyi](https://appshunter.io/developer/1703726477) |

## What reviewers say

### Achtung Duo

[App page](https://appshunter.io/ios/app/achtung-duo/id495887070)

Engage in fast-paced, local two-player snake battles on a single iPhone. Master simple controls, utilize new powerups, and enjoy customizable settings for endless chaotic duels.

**Highlights:** Local two-player snake battles, Practice mode for skill improvement, New powerups (Agile, Flame, Swap, Fat), Haptic feedback support, Customizable game settings, Bots for solo or mixed matches

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pack of Jokers | $0.99 | one-time |
| Box of Jokers | $4.99 | one-time |
| Truckload of Jokers | $19.99 | one-time |


### Aurora Stack Ball Sort Puzzle

[App page](https://appshunter.io/ios/app/aurora-stack-ball-sort-puzzle/id6756080317)

Engage your mind with a calming color sorting logic game featuring beautiful aurora-themed visuals. Solve over 2000 unique puzzles with no timers or pressure, designed for relaxation and strategic thinking. Start with 50 free levels and unlock the full experience with a one-time purchase.

**Highlights:** 2000 unique levels, Calming aurora-themed design, No timers or pressure, Strategic ball sorting gameplay, Helpful perks like Undo and Add Space, Accessibility-focused color differentiation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Levels | $1.99 | one-time |


## Frequently asked questions

### Is Achtung Duo free?

Achtung Duo costs $1.99, and also offers in-app purchases.

### Is Aurora Stack Ball Sort Puzzle free?

Aurora Stack Ball Sort Puzzle is free to download, with in-app purchases available.

### Which has better reviews, Achtung Duo or Aurora Stack Ball Sort Puzzle?

Aurora Stack Ball Sort Puzzle is rated higher. Achtung Duo averages 4.1 out of 5 from 25 ratings, while Aurora Stack Ball Sort Puzzle averages 5.0 from 1 ratings.

### Do Achtung Duo or Aurora Stack Ball Sort Puzzle have ads?

Neither Achtung Duo nor Aurora Stack Ball Sort Puzzle shows ads.

### Which is updated more often, Achtung Duo or Aurora Stack Ball Sort Puzzle?

Achtung Duo ships an update fortnightly, and Aurora Stack Ball Sort Puzzle weekly. Most recently, Achtung Duo was updated on November 6, 2026 and Aurora Stack Ball Sort Puzzle on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*