# Supernova vs Gravity OB1

The clearest difference is update cadence: Supernova at every 2 days against Gravity OB1's every 5 days. Supernova also leads on device support (5 vs 3). Gravity OB1's advantage is iOS requirement (13.4 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Supernova sells 10 one-off in-app purchases and Gravity OB1 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Supernova ships an update every 2 days, Gravity OB1 every 5 days. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Supernova | Gravity OB1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (63 ratings)](https://appshunter.io/ios/app/supernova-idle-star-forge/id6779555607/reviews)** | — |
| Number of ratings | **63** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 25 MB |
| Requires iOS | 17.0 | **13.4** |
| Devices | **iPhone, iPad, Mac, Apple TV, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HUGO ANATOLE PAUL MORICEAU](https://appshunter.io/developer/1845368412) | [Q8blog](https://appshunter.io/developer/380669318) |

## What reviewers say

### 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 |


### Gravity OB1

[App page](https://appshunter.io/ios/app/gravity-ob1/id6788852525)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $3.99 | one-time |


## Frequently asked questions

### Is Supernova free?

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

### Is Gravity OB1 free?

Gravity OB1 is free to download, with in-app purchases available.

### Do Supernova or Gravity OB1 have ads?

Neither Supernova nor Gravity OB1 shows ads.

### Which is updated more often, Supernova or Gravity OB1?

Supernova ships an update every 2 days, and Gravity OB1 every 5 days. Most recently, Supernova was updated on October 3, 2026 and Gravity OB1 on September 28, 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.*