# Building Constructor Idle vs Supernova

The clearest difference is in-app purchases: Building Constructor Idle at none against Supernova's 10. Building Constructor Idle also leads on iOS requirement (11.0 vs 17.0). Supernova's advantage is update cadence (every 2 days vs every 3 days) and device support (5 vs 3). On price and ads there is nothing between them.

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

Building Constructor Idle ships an update every 3 days, Supernova every 2 days. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Building Constructor Idle | Supernova |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 105 MB | 15 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple TV, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Ahmet Ikbal Adlig](https://appshunter.io/developer/1589838934) | [HUGO ANATOLE PAUL MORICEAU](https://appshunter.io/developer/1845368412) |

## What reviewers say

### Building Constructor Idle

[App page](https://appshunter.io/ios/app/building-constructor-idle/id1636221395)

**Features:** macOS Compatibility

**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 Building Constructor Idle free?

Building Constructor Idle is free to download, with no in-app purchases.

### Is Supernova free?

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

### Do Building Constructor Idle or Supernova have ads?

Neither Building Constructor Idle nor Supernova shows ads.

### Which is updated more often, Building Constructor Idle or Supernova?

Building Constructor Idle ships an update every 3 days, and Supernova every 2 days. Most recently, Building Constructor Idle was updated on September 28, 2026 and Supernova on October 12, 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.*