# Difference pairs vs Sort'n Fill

The clearest difference is review sentiment: Difference pairs at 94% against Sort'n Fill's 29%. Difference pairs also leads on in-app purchases (none vs 13). Sort'n Fill's advantage is update cadence (fortnightly vs every 4 months) and ratings volume (10K vs 4). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Sort'n Fill sells 13 one-off in-app purchases. Difference pairs asks for nothing beyond the download.

Sort'n Fill holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Sort'n Fill has 10K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 94% of Difference pairs's written reviews are positive against 29% of Sort'n Fill's, so the app with the better star average is not the one people write more warmly about.

Difference pairs ships an update every 4 months, Sort'n Fill fortnightly. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Difference pairs | Sort'n Fill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (4 ratings)](https://appshunter.io/ios/app/difference-pairs/id564438548/reviews) | **[4.6 (10K ratings)](https://appshunter.io/ios/app/sortn-fill/id1513749476/reviews)** |
| Number of ratings | 4 | **10K** |
| Positive reviews | **94.4% of reviews** | 29.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 53 MB | 249 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [koikoi.biz](https://appshunter.io/developer/444917150) | [Zplay (Beijing) Info. Tech. Co.,Ltd.](https://appshunter.io/developer/531022725) |

## What reviewers say

### Difference pairs

[App page](https://appshunter.io/ios/app/difference-pairs/id564438548)

Engage in a challenging mistake-finding game with 250 unique puzzles. This app offers a difficult yet fun experience for those seeking a mental workout. It has achieved significant popularity, ranking highly in the iPad game charts.

**Highlights:** 250 challenging puzzles, Mistake finding game, Difficult gameplay, Free to play, High chart ranking

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

**In-app purchases:** none


### Sort'n Fill

[App page](https://appshunter.io/ios/app/sortn-fill/id1513749476)

Engage in a simple yet fun puzzle game where you sort and organize various objects into their designated boxes. This app offers a mentally stimulating experience with clean graphics and smooth animations, perfect for those who enjoy organizing challenges.

**Highlights:** Object sorting and filling, Clean graphics, Smooth animations, Brain training puzzles, Diverse object types

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $1.99 | one-time |
| Coin Pack 1 | $1.99 | one-time |
| Special Pack | $1.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Super Move | $2.99 | one-time |
| Unlimited Sale | $3.99 | one-time |
| Coin Pack 2 | $9.99 | one-time |
| Battle Pass | $11.99 | one-time |
| Beginner Pack | $11.99 | one-time |
| Coin Pack 3 | $17.99 | one-time |
| Coin Pack 4 | $34.99 | one-time |
| Coin Pack 5 | $69.99 | one-time |
| Coin Pack 6 | $119.99 | one-time |

**What reviewers like**

- 👍 Relaxing gameplay
- 🎨 Good graphics
- ⏱️ No time limit

**What reviewers complain about**

- 💸 Too many ads
- 🤯 Annoying pop-ups and flying objects
- 🐛 Freezing issues
- 🤔 Unclear use of coins/rewards

**Reported bugs**

- Missing items on the board
- Ads still showing up after paying for ad-free version

**Requested features**

- More variety of items to sort
- Ability to turn off certain pop-ups
- Better instructions and explanations


## Frequently asked questions

### Is Difference pairs free?

Difference pairs is free to download, with no in-app purchases.

### Is Sort'n Fill free?

Sort'n Fill is free to download, with in-app purchases available.

### Which has better reviews, Difference pairs or Sort'n Fill?

Sort'n Fill is rated higher. Difference pairs averages 4.3 out of 5 from 4 ratings, while Sort'n Fill averages 4.6 from 10K ratings.

### Do Difference pairs or Sort'n Fill have ads?

Both Difference pairs and Sort'n Fill show ads.

### Which is updated more often, Difference pairs or Sort'n Fill?

Difference pairs ships an update every 4 months, and Sort'n Fill fortnightly. Most recently, Difference pairs was updated on October 18, 2026 and Sort'n Fill on October 19, 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.*