# OnceOne vs SimplePlan

The clearest difference is in-app purchases: SimplePlan at none against OnceOne's 3. OnceOne's advantage is update cadence (weekly vs every 2 months) and iOS requirement (18.0 vs 26.0). 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. SimplePlan asks for nothing beyond the download.

OnceOne ships an update weekly, SimplePlan every 2 months. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | OnceOne | SimplePlan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Size | 3 MB | 5 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dongliang Yin](https://appshunter.io/developer/1030365061) | [Ildar Khasanov](https://appshunter.io/developer/1883397362) |

## What reviewers say

### 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 |


### SimplePlan

[App page](https://appshunter.io/ios/app/simpleplan-smart-planner/id6780435610)

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

**In-app purchases:** none


## Frequently asked questions

### Is OnceOne free?

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

### Is SimplePlan free?

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

### Do OnceOne or SimplePlan have ads?

Neither OnceOne nor SimplePlan shows ads.

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

OnceOne ships an update weekly, and SimplePlan every 2 months. Most recently, OnceOne was updated on September 20, 2026 and SimplePlan on September 13, 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.*