# 数字成长 vs Sum Link

The clearest difference is device support: 数字成长 at 2 against Sum Link's —. Sum Link's advantage is iOS requirement (12.0 vs 15). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. 数字成长 sells 6 one-off in-app purchases and Sum Link sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

数字成长 ships an update fortnightly, Sum Link every 10 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 数字成长 | Sum Link |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | — |
| Update frequency | Fortnightly | **Every 10 days** |
| Size | 9 MB | 25 MB |
| Requires iOS | 15 | **12.0** |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [超 雷](https://appshunter.io/developer/508810619) | [东晗 于](https://appshunter.io/developer/1733374642) |

## What reviewers say

### 数字成长

[App page](https://appshunter.io/ios/app/1-100/id6758286511)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 少量宝石 | $0.99 | one-time |
| 一袋宝石 | $4.99 | one-time |
| 一箱宝石 | $9.99 | one-time |
| 堆积如山的宝石 | $19.99 | one-time |
| 宝石宝库 | $49.99 | one-time |
| 终极宝石包 | $89.99 | one-time |


### 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 数字成长 free?

数字成长 is free to download, with in-app purchases available.

### Is Sum Link free?

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

### Which is updated more often, 数字成长 or Sum Link?

数字成长 ships an update fortnightly, and Sum Link every 10 days. Most recently, 数字成长 was updated on October 25, 2026 and Sum Link 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.*