Spark7 vs Stack Flow
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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
Read full descriptionHide full description
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.
Stack Flow
Read full descriptionHide full description
Manage the automated factory of Cutting Soaps and sorting them into containers. Clever puzzles meet satisfying ASMR feel.
Screenshots
Verdict
The clearest difference is in-app purchases: Stack Flow at none against Spark7's 5. Stack Flow also leads on update cadence (daily vs every 5 days) and iOS requirement (15.0 vs 17.0). Spark7's advantage is ads (none vs shown). On price and device support 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 5 one-off in-app purchases. Stack Flow asks for nothing beyond the download.
Spark7 ships an update every 5 days, Stack Flow daily. The most recent releases landed on October 17, 2026 and September 28, 2026 respectively.
| Parameter | Spark7 | Stack Flow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (45 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 45 — better | — |
| Update frequency | Every 5 days | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 133 MB | 129 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew Cohen | Dipayon Debnath Dip |
In-app purchases
Spark7
- 1 Replay$0.99
- 3 Replays$1.99
- Remove Ads$2.99
Show 2 moreShow fewer
- 10 Replays$3.99
- 50 Replays$9.99
Stack Flow
No in-app purchases









