# Only Calendar vs One Line

Only Calendar and One Line are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Only Calendar sells 1 one-off in-app purchase and One Line sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Only Calendar | One Line |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Size | 3 MB | 37 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Lizzian LLC](https://appshunter.io/developer/1895095832) | [XTI Co.,Ltd.](https://appshunter.io/developer/1533410506) |

## What reviewers say

### Only Calendar

[App page](https://appshunter.io/ios/app/only-calendar/id6772754764)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Only Calendar Pro | $5.99 | one-time |


### One Line

[App page](https://appshunter.io/ios/app/one-line-notes-that-sort/id6806730576)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Line Pro (Monthly) | $1.99 | per month |
| One Line Pro | $17.99 | per year |


## Frequently asked questions

### Is Only Calendar free?

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

### Is One Line free?

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

### Do Only Calendar or One Line have ads?

Neither Only Calendar nor One Line shows ads.

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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.*