# 1doc vs Haizen

The clearest difference is in-app purchases: 1doc at none against Haizen's 2. Haizen's advantage is update cadence (every 9 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Haizen sells 2 in-app purchases, starting at $2.99 per month. 1doc asks for nothing beyond the download.

1doc ships an update every 3 weeks, Haizen every 9 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 1doc | Haizen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Size | 132 MB | 26 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [iAPPS PTE LTD](https://appshunter.io/developer/597193482) | [Tigran Simonyan](https://appshunter.io/developer/1787842548) |

## What reviewers say

### 1doc

[App page](https://appshunter.io/ios/app/1doc/id1050926309)

**Features:** Vision Pro support

**In-app purchases:** none


### Haizen

[App page](https://appshunter.io/ios/app/haizen-habit-tracker/id6775433884)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Haizen Pro Monthly | $2.99 | per month |
| Haizen Pro Yearly | $14.99 | per year |


## Frequently asked questions

### Is 1doc free?

1doc is free to download, with no in-app purchases.

### Is Haizen free?

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

### Do 1doc or Haizen have ads?

Neither 1doc nor Haizen shows ads.

### Which is updated more often, 1doc or Haizen?

1doc ships an update every 3 weeks, and Haizen every 9 days. Most recently, 1doc was updated on October 24, 2026 and Haizen on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*