# World Button vs Supernova

The clearest difference is in-app purchases: World Button at none against Supernova's 10. World Button also leads on iOS requirement (15.0 vs 17.0). Supernova's advantage is ads (none vs shown) and update cadence (every 2 days vs every 4 days). On price there is nothing between them.

Both are free to download. Supernova sells 10 one-off in-app purchases. World Button asks for nothing beyond the download.

World Button ships an update every 4 days, Supernova every 2 days. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | World Button | Supernova |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (52 ratings)](https://appshunter.io/ios/app/supernova-idle-star-forge/id6779555607/reviews)** |
| Number of ratings | — | **52** |
| Positive reviews | — | 90.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 220 MB | 15 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple TV, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Celestial Pug LLC](https://appshunter.io/developer/1615114330) | [HUGO ANATOLE PAUL MORICEAU](https://appshunter.io/developer/1845368412) |

## What reviewers say

### World Button

[App page](https://appshunter.io/ios/app/world-button/id6742792580)

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

**In-app purchases:** none


### Supernova

[App page](https://appshunter.io/ios/app/supernova-idle-star-forge/id6779555607)

An idle space tycoon game where you fuse hydrogen to grow and detonate stars. Earn permanent power-ups with each supernova to accelerate future runs. Features offline progress and a visually evolving star.

**Highlights:** Fuse hydrogen to create and grow stars, Offline progress and production, Visually evolving star stages, Prestige system with supernova cinematics, Deep multiplier stacking and research upgrades, Daily missions and streaks, Fully offline gameplay

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Photons | $0.99 | one-time |
| Time Warp: 4 Hours | $1.99 | one-time |
| Break the Piggy Bank | $2.99 | one-time |
| Automation Core | $3.99 | one-time |
| Supporter Pack | $4.99 | one-time |
| Time Warp: 24 Hours | $4.99 | one-time |
| 300 Photons | $4.99 | one-time |
| 700 Photons | $9.99 | one-time |
| Time Warp: 7 Days | $14.99 | one-time |
| 1600 Photons | $19.99 | one-time |


## Frequently asked questions

### Is World Button free?

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

### Is Supernova free?

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

### Do World Button or Supernova have ads?

World Button shows ads; Supernova does not.

### Which is updated more often, World Button or Supernova?

World Button ships an update every 4 days, and Supernova every 2 days. Most recently, World Button was updated on September 19, 2026 and Supernova on September 24, 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.*