# rare numbers vs Sumbind

The clearest difference is update cadence: Sumbind at fortnightly against rare numbers's every 4 months. Sumbind also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

rare numbers ships an update every 4 months, Sumbind fortnightly. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | rare numbers | Sumbind |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (5 ratings)](https://appshunter.io/ios/app/sumbind/id6764254658/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | — | Ad-supported |
| Size | 13 MB | 228 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Griffing](https://appshunter.io/developer/1772253467) | [治兵 陈](https://appshunter.io/developer/1893148771) |

## What reviewers say

### rare numbers

[App page](https://appshunter.io/ios/app/rare-numbers/id6744262836)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sumbind

[App page](https://appshunter.io/ios/app/sumbind/id6764254658)

A relaxing casual puzzle game where players combine elements with strategic thinking to overcome challenges. It offers simple rules for an easy start and a pleasant, stress-free experience for downtime.

**Highlights:** Relaxing casual gameplay, Element combination puzzles, Strategic thinking required, Simple rules, easy to learn, Pleasant and stress-free experience

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

**In-app purchases:** none


## Frequently asked questions

### Is rare numbers free?

rare numbers is free to download, with no in-app purchases.

### Is Sumbind free?

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

### Do rare numbers or Sumbind have ads?

Both rare numbers and Sumbind show ads.

### Which is updated more often, rare numbers or Sumbind?

rare numbers ships an update every 4 months, and Sumbind fortnightly. Most recently, rare numbers was updated on October 16, 2026 and Sumbind on October 24, 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.*