# 数字上海 vs Treer

The clearest difference is update cadence: Treer at every 4 days against 数字上海's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 数字上海 sells 13 one-off in-app purchases and Treer sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

数字上海 ships an update every 2 months, Treer every 4 days. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 数字上海 | Treer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 131 MB | 16 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [龙源数字城市(北京)科技有限公司](https://appshunter.io/developer/1484299426) | [子捷 陈](https://appshunter.io/developer/1770204435) |

## What reviewers say

### 数字上海

[App page](https://appshunter.io/ios/app/id1566848729)

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6杂志币 | $0.99 | one-time |
| 数字城市会员（月） | $2.99 | one-time |
| 88杂志币 | $12.99 | one-time |
| 198杂志币 | $29.99 | one-time |
| 名刊会会员365天 | $29.99 | one-time |
| 数字城市会员（年） | $29.99 | one-time |
| 288杂志币 | $39.99 | one-time |
| 288杂志币 | $45.99 | one-time |
| 388杂志币 | $59.99 | one-time |
| 数字城市会员365天 | $59.99 | one-time |
| 588杂志币 | $79.99 | one-time |
| 588杂志币 | $89.99 | one-time |
| 读书会会员 | $299.99 | one-time |


### Treer

[App page](https://appshunter.io/ios/app/treer/id6714452618)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Annual Subscription | $7.99 | per year |
| Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is 数字上海 free?

数字上海 is free to download, with in-app purchases available.

### Is Treer free?

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

### Do 数字上海 or Treer have ads?

Neither 数字上海 nor Treer shows ads.

### Which is updated more often, 数字上海 or Treer?

数字上海 ships an update every 2 months, and Treer every 4 days. Most recently, 数字上海 was updated on October 22, 2026 and Treer on October 25, 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.*