# Compressor HP vs OneTodo

The clearest difference is update cadence: OneTodo at every 9 days against Compressor HP's every 4 months. Compressor HP's advantage is iOS requirement (14.4 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Compressor HP ships an update every 4 months, OneTodo every 9 days. The most recent releases landed on October 6, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Compressor HP | OneTodo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (3 ratings)](https://appshunter.io/ios/app/onetodo-personal-task-system/id1546530435/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | — | Subscription |
| Size | 3 MB | 140 MB |
| Requires iOS | **14.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Melchisedec Martinez Rodriguez](https://appshunter.io/developer/1534398511) | [Chengdu Reinvent Technology Co., Ltd.](https://appshunter.io/developer/1250290964) |

## What reviewers say

### Compressor HP

[App page](https://appshunter.io/ios/app/compressor-hp/id1539320947)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock capacitor size | $0.99 | one-time |
| Unlock compressors type | $2.99 | one-time |
| Unlock all refrigerants | $2.99 | one-time |


### OneTodo

[App page](https://appshunter.io/ios/app/onetodo-personal-task-system/id1546530435)

Organize your life with a hierarchical task management system. Create tasks, pages, projects, boxes, and spaces to structure your to-do list and plans. Track project progress and manage separate data spaces for different aspects of your life.

**Highlights:** Hierarchical task organization (Task > Page > Project > Box > Space), Create standalone tasks, Use pages as project subtitles, Track project completion progress, Group projects with boxes, Separate data spaces for internal accounts

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OneTodo Pro (Monthly) | $0.99 | per month |
| OneTodo Pro (Yearly) | $6.99 | per year |
| OneTodo Pro (Lifetime) | $14.99 | one-time |


## Frequently asked questions

### Is Compressor HP free?

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

### Is OneTodo free?

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

### Do Compressor HP or OneTodo have ads?

Neither Compressor HP nor OneTodo shows ads.

### Which is updated more often, Compressor HP or OneTodo?

Compressor HP ships an update every 4 months, and OneTodo every 9 days. Most recently, Compressor HP was updated on October 6, 2026 and OneTodo on September 26, 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.*