# Factor! vs Sum Link

The clearest difference is in-app purchases: Factor! at none against Sum Link's 2. Factor! also leads on device support. Sum Link's advantage is iOS requirement (12.0 vs 16.0). On price and update cadence there is nothing between them.

Both are free to download. Sum Link sells 2 one-off in-app purchases. Factor! asks for nothing beyond the download.

Factor! ships an update fortnightly, Sum Link every 10 days. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Factor! | Sum Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (29 ratings)](https://appshunter.io/ios/app/factor/id6476070435/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free | — |
| Size | 4 MB | 25 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Samuel Gauck](https://appshunter.io/developer/1692227657) | [东晗 于](https://appshunter.io/developer/1733374642) |

## 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


### Sum Link

[App page](https://appshunter.io/ios/app/sum-linkconnect-and-sum/id6760685335)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Infinite Focus | $0.99 | one-time |
| Elite Solver Bundle | $1.99 | one-time |


## Frequently asked questions

### Is Factor! free?

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

### Is Sum Link free?

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

### Which is updated more often, Factor! or Sum Link?

Factor! ships an update fortnightly, and Sum Link every 10 days. Most recently, Factor! was updated on October 14, 2026 and Sum Link on October 15, 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.*