# 一应必达 vs Notator | Annotate Documents

The clearest difference is in-app purchases: 一应必达 at none against Notator | Annotate Documents's 2. 一应必达 also leads on iOS requirement (12.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Notator | Annotate Documents sells 2 in-app purchases, starting at $1.99 per month. 一应必达 asks for nothing beyond the download.

一应必达 ships an update monthly, Notator | Annotate Documents every 2 months. The most recent releases landed on September 9, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 一应必达 | Notator | Annotate Documents |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 222 MB | 30 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [一应科技](https://appshunter.io/developer/1484306407) | [CIMTOPS SG LAB Pte. Ltd.](https://appshunter.io/developer/1657070999) |

## What reviewers say

### 一应必达

[App page](https://appshunter.io/ios/app/id6444039966)

**Features:** macOS Compatibility

**In-app purchases:** none


### Notator | Annotate Documents

[App page](https://appshunter.io/ios/app/notator-annotate-documents/id6447326736)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notator Pro Monthly | $1.99 | per month |
| Notator Pro Yearly | $8.99 | per year |


## Frequently asked questions

### Is 一应必达 free?

一应必达 is free to download, with no in-app purchases.

### Is Notator | Annotate Documents free?

Notator | Annotate Documents is free to download, with in-app purchases available.

### Do 一应必达 or Notator | Annotate Documents have ads?

Neither 一应必达 nor Notator | Annotate Documents shows ads.

### Which is updated more often, 一应必达 or Notator | Annotate Documents?

一应必达 ships an update monthly, and Notator | Annotate Documents every 2 months. Most recently, 一应必达 was updated on September 9, 2026 and Notator | Annotate Documents on September 19, 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.*