# Barnaburn vs Prism

The clearest difference is in-app purchases: Barnaburn at none against Prism's 1. Barnaburn also leads on iOS requirement (18.2 vs 26.0). Prism's advantage is device support (3 vs 1). On price, update cadence and ads there is nothing between them.

Both are free to download. Prism sells 1 in-app purchase, starting at $1.99 per month. Barnaburn asks for nothing beyond the download.

Barnaburn ships an update fortnightly, Prism every 11 days. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Barnaburn | Prism |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/barnaburn/id6757629635/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 11 days** |
| Monetization | Free | — |
| Size | 2 MB | 3 MB |
| Requires iOS | **18.2** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Moksyakov](https://appshunter.io/developer/1867974170) | [剑炜 陈](https://appshunter.io/developer/1868267178) |

## What reviewers say

### Barnaburn

[App page](https://appshunter.io/ios/app/barnaburn/id6757629635)

Gamify your sleep routine with this app that connects to Apple Health. Earn rewards like XP and awards by hitting your sleep goals, and clear playful citations with good sleep. Track your progress with insightful graphs and an animated companion.

**Highlights:** Gamified sleep tracking, Apple Health integration, XP, levels, and awards system, Playful citation system for missed goals, Sleep goal setting, Progress graphs and insights, Animated companion

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

**In-app purchases:** none


### Prism

[App page](https://appshunter.io/ios/app/prism-sunlight-tracker/id6758259341)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prism Premium (Monthly) | $1.99 | per month |


## Frequently asked questions

### Is Barnaburn free?

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

### Is Prism free?

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

### Do Barnaburn or Prism have ads?

Neither Barnaburn nor Prism shows ads.

### Which is updated more often, Barnaburn or Prism?

Barnaburn ships an update fortnightly, and Prism every 11 days. Most recently, Barnaburn was updated on October 10, 2026 and Prism on October 11, 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.*