# To Do List vs Lucid

The clearest difference is iOS requirement: To Do List at 15.1 against Lucid's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

To Do List ships an update every 4 days, Lucid every 3 days. The most recent releases landed on September 5, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | To Do List | Lucid |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 36 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ilya Dylko](https://appshunter.io/developer/1484669466) | [Goo wong Kwon](https://appshunter.io/developer/1895637047) |

## What reviewers say

### To Do List

[App page](https://appshunter.io/ios/app/to-do-list-dumb-calendar/id6761289669)

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

**In-app purchases:** none


### Lucid

[App page](https://appshunter.io/ios/app/lucid-second-brain/id6777908024)

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

**In-app purchases:** none


## Frequently asked questions

### Is To Do List free?

To Do List is free to download, with no in-app purchases.

### Is Lucid free?

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

### Do To Do List or Lucid have ads?

Neither To Do List nor Lucid shows ads.

### Which is updated more often, To Do List or Lucid?

To Do List ships an update every 4 days, and Lucid every 3 days. Most recently, To Do List was updated on September 5, 2026 and Lucid on September 17, 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.*