# Argon18 vs Circa

The clearest difference is iOS requirement: Argon18 at 13 against Circa's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Argon18 | Circa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/circa-sleep-and-bedtime-routine/id6761396508/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | — | Free |
| Size | 87 MB | 11 MB |
| Requires iOS | **13** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Argon 18](https://appshunter.io/developer/1571362675) | [jean-baptiste delcros](https://appshunter.io/developer/1727119809) |

## What reviewers say

### Argon18

[App page](https://appshunter.io/ios/app/argon18/id1627759819)

**In-app purchases:** none


### Circa

[App page](https://appshunter.io/ios/app/circa-sleep-and-bedtime-routine/id6761396508)

Build a calmer bedtime routine and understand your sleep patterns with private insights from Apple Health. Plan daily habits, reduce digital distractions before bed, and track sleep trends securely on your device.

**Highlights:** Personalized daily routines, Digital distraction blocking, Private sleep insights, Circadian schedule visualization, Product discovery for sleep, Apple Health integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Argon18 free?

Argon18 is free to download, with no in-app purchases.

### Is Circa free?

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

### Do Argon18 or Circa have ads?

Neither Argon18 nor Circa 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.*