Zero+ vs Spark7
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Zero+
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.
- Swipe blocks to merge
- Combine positive and negative numbers
- Create all zeros
- 120+ levels
- New block types
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A simple iOS puzzle game that is devilishly fun to play. Just add positive and negative numbered blocks to one another to make all zeros. • Easy to play: swipe blocks left, right, up, or down • Lots to do: 120 levels and counting... • Never the same: new levels bring new kinds of blocks
Spark7
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.
- Numbered ball dropping gameplay
- Explosive chain reaction combos
- Global leaderboards and replays
- Cognitive skill enhancement
- Satisfying and engaging puzzles
- Drop7 alternative
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This electric number puzzle will rewire your brain and may make you miss your bus stop. Spark7 is like Drop7 on steroids – as if Tetris, Dr. Mario, CandyCrush, Sudoku, and 2048 got together and had a baby to become even more satisfying and engaging. The gameplay seems simple at first. Just drop numbered balls into the grid, match them by count, and chain explosive combos (“surges”) to boost your score. But very quickly, you’ll find yourself gradually understanding the game’s hidden nuances over time, continuing to improve your skills and your brainpower during every moment of play. You’ll also find yourself obsessing over the global top scores for each individual Game ID, and cranking your “replays” to work up the Leaderboard. The best part is that Spark7 was created by a literal brain scientist. Each game mechanic is meticulously crafted to exercise your spatial reasoning, working memory, executive function, processing speed, attention span, problem solving, and mental resilience. If the disappearance of Drop 7 left a hole in your puzzle life, Spark7 fills it — and then some. This is the number drop game you didn't know you needed. Download Spark7 and light up your brain.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Zero+ | Spark7 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (178 ratings) | 4.9 (47 ratings) — better |
| Positive reviews | 96.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 178 — better | 47 |
| Update frequency | Monthly | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 7.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 3 MB | 133 MB |
| Age rating | 4+ | 4+ |
| Developer | SaturnBoy, LLC | Andrew Cohen |
Customer experience
Zero+
Spark7
Bugs and requests
Zero+
Reported bugs
4 issues- 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
7 requests- 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)
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- User-generated challenges or community puzzles
- Higher difficulty levels
Spark7
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Zero+
No in-app purchases
Spark7
- 1 Replay$0.99
- Remove Ads Discount$1.99
- 3 Replays$1.99
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- Remove Ads$2.99
- 10 Replays$3.99
- 50 Replays$9.99








