# 问前程 vs 水印相机

The clearest difference is in-app purchases: 问前程 at none against 水印相机's 3. 问前程 also leads on device support (3 vs 1) and iOS requirement (9.0 vs 17). 水印相机's advantage is ads (none vs shown) and update cadence (every 4 days vs fortnightly). On price there is nothing between them.

Both are free to download. 水印相机 sells 3 in-app purchases, starting at $2.99 per 7 days. 问前程 asks for nothing beyond the download.

问前程 ships an update fortnightly, 水印相机 every 4 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 问前程 | 水印相机 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 26 MB | 118 MB |
| Requires iOS | **9.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [春洋 于](https://appshunter.io/developer/1594061932) | [先全 顾](https://appshunter.io/developer/1706065914) |

## What reviewers say

### 问前程

[App page](https://appshunter.io/ios/app/id1596743636)

**Features:** macOS Compatibility

**In-app purchases:** none


### 水印相机

[App page](https://appshunter.io/ios/app/id6499102489)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $2.99 | per 7 days |
| 月订阅 | $3.99 | per month |
| 终生会员 | $7.99 | one-time |


## Frequently asked questions

### Is 问前程 free?

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

### Is 水印相机 free?

水印相机 is free to download, with in-app purchases available.

### Do 问前程 or 水印相机 have ads?

问前程 shows ads; 水印相机 does not.

### Which is updated more often, 问前程 or 水印相机?

问前程 ships an update fortnightly, and 水印相机 every 4 days. Most recently, 问前程 was updated on November 3, 2026 and 水印相机 on October 30, 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.*