# Zero+ vs Spark7

The clearest difference is in-app purchases: Zero+ at none against Spark7's 6. Zero+ also leads on ratings volume (178 vs 47) and iOS requirement (7.0 vs 16.0). Spark7's advantage is update cadence (every 6 days vs monthly). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Spark7 sells 6 one-off in-app purchases. Zero+ asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Zero+ against 4.9 for Spark7. Both are backed by a comparable volume of ratings — 178 and 47 respectively. Written reviews are what separate them: 97% of Zero+'s written reviews are positive against 100% of Spark7's.

Zero+ ships an update monthly, Spark7 every 6 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Zero+ | Spark7 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (178 ratings)](https://appshunter.io/ios/app/zero-plus/id944791433/reviews) | **[4.9 (47 ratings)](https://appshunter.io/ios/app/spark7-chain-reaction-game/id6759691707/reviews)** |
| Number of ratings | **178** | 47 |
| Positive reviews | 96.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 133 MB |
| Requires iOS | **7.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SaturnBoy, LLC](https://appshunter.io/developer/366019703) | [Andrew Cohen](https://appshunter.io/developer/1880237804) |

## What reviewers say

### Zero+

[App page](https://appshunter.io/ios/app/zero-plus/id944791433)

This is a fun and challenging iOS puzzle game where players combine numbered blocks to create zeros. Swipe blocks to merge them and solve increasingly complex levels. Enjoy a vast number of stages with unique block types.

**Highlights:** Swipe blocks to merge, Combine positive and negative numbers, Create all zeros, 120+ levels, New block types

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🧠 Excellent brain exercise and logic puzzle challenge
- 👍 Simple, intuitive, and minimalist design
- 🎮 Addictive and engaging gameplay mechanics
- 📈 Difficulty increases gradually and progressively
- ✨ No ads or distracting elements

**What reviewers complain about**

- ⏱️ Game finishes too quickly (only 120 levels)
- 🐛 Occasional freezing or graying out of screen
- 🔇 Blocks background music and podcast playback
- 🎨 Outdated visual design and interface
- ⏸️ No hints available when stuck on puzzles

**Reported bugs**

- Screen grays out when undoing moves too quickly
- Tiles occasionally unresponsive to input
- App freezes requiring restart
- Background music/podcasts get blocked during gameplay

**Requested features**

- More levels or additional puzzle packs
- Hints system for difficult puzzles
- Updated and more modern visual design
- Allow background music while playing
- Skip level feature (some users noted this exists)


### Spark7

[App page](https://appshunter.io/ios/app/spark7-chain-reaction-game/id6759691707)

This electric number puzzle game challenges your brain with dropping numbered balls and creating explosive chain reactions. It's designed by a brain scientist to improve cognitive skills like spatial reasoning and problem-solving.

**Highlights:** Numbered ball dropping gameplay, Explosive chain reaction combos, Global leaderboards and replays, Cognitive skill enhancement, Satisfying and engaging puzzles, Drop7 alternative

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Replay | $0.99 | one-time |
| Remove Ads Discount | $1.99 | one-time |
| 3 Replays | $1.99 | one-time |
| Remove Ads | $2.99 | one-time |
| 10 Replays | $3.99 | one-time |
| 50 Replays | $9.99 | one-time |


## Frequently asked questions

### Is Zero+ free?

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

### Is Spark7 free?

Spark7 is free to download, with in-app purchases available.

### Which has better reviews, Zero+ or Spark7?

Spark7 is rated higher. Zero+ averages 4.8 out of 5 from 178 ratings, while Spark7 averages 4.9 from 47 ratings.

### Do Zero+ or Spark7 have ads?

Neither Zero+ nor Spark7 shows ads.

### Which is updated more often, Zero+ or Spark7?

Zero+ ships an update monthly, and Spark7 every 6 days. Most recently, Zero+ was updated on October 24, 2026 and Spark7 on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*