# Factor! vs Shelf Sort

The clearest difference is in-app purchases: Factor! at none against Shelf Sort's 6. Factor! also leads on ads (none vs shown) and ratings volume (29 vs 3). Shelf Sort's advantage is update cadence (every 4 days vs fortnightly) and iOS requirement (12.0 vs 16.0). On price, rating, review sentiment and device support there is nothing between them.

Both are free to download. Shelf Sort sells 6 one-off in-app purchases. Factor! asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Factor! against 5.0 for Shelf Sort. That said, the two scores are not equally well evidenced: Factor! has 29 ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Factor! ships an update fortnightly, Shelf Sort every 4 days. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Factor! | Shelf Sort |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (29 ratings)](https://appshunter.io/ios/app/factor/id6476070435/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/shelf-sort/id6478661189/reviews) |
| Number of ratings | **29** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 202 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Samuel Gauck](https://appshunter.io/developer/1692227657) | [Emre Yazar](https://appshunter.io/developer/1526329565) |

## What reviewers say

### Factor!

[App page](https://appshunter.io/ios/app/factor/id6476070435)

Engage in a daily math and logic puzzle to enhance your streak and challenge friends. Select from 25 numbers daily, strategically choosing them in the correct sequence to achieve the highest score.

**Highlights:** Daily math and logic puzzles, Streak building, Friend competition, Number selection and ordering, Score maximization

**Features:** macOS Compatibility

**In-app purchases:** none


### Shelf Sort

[App page](https://appshunter.io/ios/app/shelf-sort/id6478661189)

Engage in a match-3 puzzle game where players clear shelves by matching three identical objects. Progress through levels by strategically clearing items and completing objectives.

**Highlights:** Match 3 objects, Clear shelves, Puzzle gameplay, Level progression

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Coins | $1.99 | one-time |
| 500 Coins | $9.99 | one-time |
| 1000 Coins | $14.99 | one-time |
| 2500 Coins | $29.99 | one-time |
| 5000 Coins | $59.99 | one-time |
| 10000 Coins | $99.99 | one-time |


## Frequently asked questions

### Is Factor! free?

Factor! is free to download, with no in-app purchases.

### Is Shelf Sort free?

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

### Which has better reviews, Factor! or Shelf Sort?

Factor! and Shelf Sort are both rated 5.0 out of 5 on the App Store, from 29 and 3 ratings respectively.

### Do Factor! or Shelf Sort have ads?

Shelf Sort shows ads; Factor! does not.

### Which is updated more often, Factor! or Shelf Sort?

Factor! ships an update fortnightly, and Shelf Sort every 4 days. Most recently, Factor! was updated on September 28, 2026 and Shelf Sort on September 29, 2026.

---

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