# JustDoo vs OnceOne

The clearest difference is in-app purchases: JustDoo at none against OnceOne's 3. JustDoo also leads on iOS requirement (14.0 vs 18.0). OnceOne's advantage is update cadence (weekly vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. OnceOne sells 3 in-app purchases, starting at $0.99 per month. JustDoo asks for nothing beyond the download.

JustDoo ships an update every 6 weeks, OnceOne weekly. The most recent releases landed on October 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | JustDoo | OnceOne |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justdoo/id928377463/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 6 MB | 3 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Infocentrum Bt.](https://appshunter.io/developer/862364253) | [Dongliang Yin](https://appshunter.io/developer/1030365061) |

## What reviewers say

### JustDoo

[App page](https://appshunter.io/ios/app/justdoo/id928377463)

This cloud-based system helps manage tasks and projects, improving personal efficiency and business organization. It guides users through proven time management principles, making organization effortless even without prior knowledge.

**Highlights:** Guided user assistance for efficient work, Supports Morning Planning methodology, Facilitates focused work, Identifies time-wasters through logging, Supports team collaboration and communication, Aids effective delegation, Improves calendar utilization, Assists in task size estimation

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

**In-app purchases:** none


### OnceOne

[App page](https://appshunter.io/ios/app/onceone-grouping-to-do-tasks/id6744550176)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro(Monthly) | $0.99 | per month |
| Pro(Annual) | $9.99 | per year |
| Pro(Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is JustDoo free?

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

### Is OnceOne free?

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

### Do JustDoo or OnceOne have ads?

Neither JustDoo nor OnceOne shows ads.

### Which is updated more often, JustDoo or OnceOne?

JustDoo ships an update every 6 weeks, and OnceOne weekly. Most recently, JustDoo was updated on October 7, 2026 and OnceOne on October 28, 2026.

---

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