# AKAI vs Poly Worlds

The clearest difference is in-app purchases: Poly Worlds at none against AKAI's 3. Poly Worlds also leads on update cadence (weekly vs every 3 weeks). AKAI's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.0). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. AKAI sells 3 one-off in-app purchases. Poly Worlds asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for AKAI against 5.0 for Poly Worlds. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

AKAI ships an update every 3 weeks, Poly Worlds weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | AKAI | Poly Worlds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/akai-spot-the-difference/id1454094340/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/poly-worlds-hidden-object/id6749450133/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 187 MB | 191 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CR Game](https://appshunter.io/developer/983332959) | [BugFix Games Entertainment](https://appshunter.io/developer/1689361525) |

## What reviewers say

### AKAI

[App page](https://appshunter.io/ios/app/akai-spot-the-difference/id1454094340)

Engage your brain with a picture puzzle game where you must find five differences between two similar images. Progress through multiple challenging levels, collect stars, and use hints to sharpen your observation skills. It's an addictive challenge for puzzle enthusiasts.

**Highlights:** Find 5 differences between 2 photos, Multiple challenging levels, Collect stars and earn high scores, Use hints to find differences, Great design and entertaining sounds

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruby 100 | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Ruby 300 | $1.99 | one-time |


### Poly Worlds

[App page](https://appshunter.io/ios/app/poly-worlds-hidden-object/id6749450133)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AKAI free?

AKAI is free to download, with in-app purchases available.

### Is Poly Worlds free?

Poly Worlds is free to download, with no in-app purchases.

### Which has better reviews, AKAI or Poly Worlds?

AKAI and Poly Worlds are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do AKAI or Poly Worlds have ads?

Poly Worlds shows ads; AKAI does not.

### Which is updated more often, AKAI or Poly Worlds?

AKAI ships an update every 3 weeks, and Poly Worlds weekly. Most recently, AKAI was updated on October 24, 2026 and Poly Worlds on October 24, 2026.

---

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