# Atom Fusion vs Exponential Idle

The clearest difference is rating: Exponential Idle at 4.9 against Atom Fusion's 4.3. Exponential Idle also leads on ratings volume (4.1K vs 6) and iOS requirement (8.0 vs 11.0). Atom Fusion's advantage is ads (none vs shown) and update cadence (every 5 days vs every 3 weeks). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Atom Fusion sells 1 one-off in-app purchase and Exponential Idle sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Exponential Idle holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Exponential Idle has 4.1K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 100% of Atom Fusion's written reviews are positive against 92% of Exponential Idle's, so the app with the better star average is not the one people write more warmly about.

Atom Fusion ships an update every 5 days, Exponential Idle every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Atom Fusion | Exponential Idle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/atom-fusion/id1373864217/reviews) | **[4.9 (4.1K ratings)](https://appshunter.io/ios/app/exponential-idle/id1538487382/reviews)** |
| Number of ratings | 6 | **4.1K** |
| Positive reviews | **100.0% of reviews** | 91.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 95 MB |
| Requires iOS | 11.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dennis van Oosten](https://appshunter.io/developer/1373864216) | [Gilles-Philippe Paille](https://appshunter.io/developer/1538487384) |

## What reviewers say

### Atom Fusion

[App page](https://appshunter.io/ios/app/atom-fusion/id1373864217)

A casual tapping game where atoms fuse to create new elements. Research new atoms with a particle accelerator to discover all 118 elements of the periodic table.

**Highlights:** Atom fusion gameplay, Discover all 118 elements, Particle accelerator research, Casual tapping mechanics, Progressive discovery

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Exponential Idle

[App page](https://appshunter.io/ios/app/exponential-idle/id1538487382)

Engage in a math-inspired incremental game where you strategically stack virtual money through exponential growth. Advance through time, make variable changes, and purchase upgrades to accelerate your earnings and unlock achievements.

**Highlights:** Exponential growth mechanics, Time progression, Change of variables, Buy upgrades, Earn virtual money, Unlock achievements

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donate | $0.99 | one-time |
| Permanent Ad Reward | $1.99 | one-time |
| Donate | $1.99 | one-time |
| Donate | $3.99 | one-time |

**What reviewers like**

- 👍 Great and addicting game
- 👍 Interesting story and educational
- 👍 Numbers go big
- 👍 User-friendly with good descriptions
- 👍 Highly automated progression

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- ⏱️ Slow progression after initial stages
- 🕹️ Difficult mini-games
- 🔒 Harsh time-change penalty
- 🔋 Potential performance issues on some devices

**Reported bugs**

- Puzzle mini-games not loading correctly
- Offline progress issues after updates
- Occasional app crashes

**Requested features**

- More mini-games and challenges
- Better explanations for advanced mechanics
- Adjustable color schemes and visual customization
- Improved offline progress tracking
- Smoother performance and optimization


## Frequently asked questions

### Is Atom Fusion free?

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

### Is Exponential Idle free?

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

### Which has better reviews, Atom Fusion or Exponential Idle?

Exponential Idle is rated higher. Atom Fusion averages 4.3 out of 5 from 6 ratings, while Exponential Idle averages 4.9 from 4.1K ratings.

### Do Atom Fusion or Exponential Idle have ads?

Exponential Idle shows ads; Atom Fusion does not.

### Which is updated more often, Atom Fusion or Exponential Idle?

Atom Fusion ships an update every 5 days, and Exponential Idle every 3 weeks. Most recently, Atom Fusion was updated on October 24, 2026 and Exponential Idle on October 25, 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.*