# Spark7 - Chain Reaction Game — Exercise your logical thinking > A brain-training number drop puzzle game with explosive chain reactions. (iPhone/iPad app by Andrew Cohen.) - Source: https://appshunter.io/ios/app/spark7-chain-reaction-game/id6759691707 (this page in markdown: same URL + `.md`) - Developer: [Andrew Cohen](https://appshunter.io/developer/1880237804) - Category: Games, Casual, Puzzle - Price: Free with in-app purchases - Rating: 5.00/5 from 43 App Store ratings · 29 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 133 MB - Languages: American English - Released: 2026-05-31 - Data updated: 2026-09-02 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/spark7-chain-reaction-game/id6759691707/reviews.md ## What is Spark7? 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. ## Key features - Numbered ball dropping gameplay - Explosive chain reaction combos - Global leaderboards and replays - Cognitive skill enhancement - Satisfying and engaging puzzles - Drop7 alternative ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ads | $2.99 | one-time | | 1 Replay | $0.99 | one-time | | 50 Replays | $9.99 | one-time | | 10 Replays | $3.99 | one-time | | 3 Replays | $1.99 | one-time | ## Recent user reviews (10 of 29) All indexed reviews: https://appshunter.io/ios/app/spark7-chain-reaction-game/id6759691707/reviews.md ### 5/5 — Relaxing and challenging at the same time *2026-07-18* It’s easy to get started and then you can learn more strategies. The layout is simple and the music is calming so the strategic focus is quite relaxing. ### 5/5 — Highly addictive *2026-07-09* Love the simplicity and fun! Great game. ### 5/5 — Addictive! *2026-07-09* What a fun game!! More challenging than it first appears. ### 5/5 — Expand Your Mind *2026-07-09* Very fun, highly addictive mobile app game. Play against friends and compete with others around the globe to see who you can beat! Challenging, competitive, and engaging ### 5/5 — Tetris meets Sudoku *2026-07-07* Tetris meets Sudoku. This mind-bending puzzle game is easy to learn but difficult to master. Compete globally, challenge your friends, or simply compete against yourself as you continually chase a higher score. Addictive, rewarding, and one of those rare games you’ll keep coming back to. ### 5/5 — I’ll just play one more… *2026-07-07* This game hits the sweet spot between relaxing and challenging. The rules are simple, but there’s real depth once you start planning several moves ahead. It scratches the same itch as the best classic puzzle games, but still feels fresh. ### 5/5 — Addicting! *2026-06-21* Once you start, you can’t stop. Love the game # count and personal leaderboard. Plus, the ads are not as much of a nuisance as they are on other gaming apps, which makes playing all the more addicting. ### 5/5 — Super addicting *2026-06-18* This game is really addicting. It took me a few minutes to realize stacks can go horizontally too and now I’m determined to get on the leaderboard ### 5/5 — Fun and sharp *2026-06-18* It’s a fast, fun, sharp and quite compulsive game- I found myself feeling the need to work harder to get smarter moves. And there is math. A good way to take a different type of phone break. ### 5/5 — Addicting Challenge *2026-06-17* This is my go-to for my commute! So fun. Also: how am I so bad at this game. Am I stupid? I hope not - because I am a scientist. Awesome game! ## Frequently asked questions about Spark7 ### What is Spark7? Spark7 is a number drop puzzle game designed to exercise your brain. It involves dropping numbered balls into a grid, matching them by count, and creating chain reactions for high scores. ### Is Spark7 similar to Drop7? Yes, Spark7 is described as a 'Drop7 alternative' and 'like Drop7 on steroids.' It aims to provide a more satisfying and engaging experience for fans of the genre. ### What cognitive skills does Spark7 improve? Developed by a brain scientist, Spark7 is meticulously crafted to exercise spatial reasoning, working memory, executive function, processing speed, attention span, problem-solving, and mental resilience. ### Can I compete with other players in Spark7? Yes, Spark7 allows you to obsess over global top scores for each Game ID and work your way up the Leaderboard by sharing and improving your 'replays'. ### What devices can I play Spark7 on? Spark7 is available on iPhone and iPad, making it accessible for Apple users on the go. ### How often is Spark7 updated? The latest version of Spark7 is 2026.0613.02, which was released on June 14, 2026. Updates are frequent, ensuring a reliable and evolving gameplay experience. ### What is the age rating for Spark7? Spark7 has an age rating of 4+, making it suitable for a wide range of players. ### Does Spark7 have ads? No, Spark7 does not contain advertisements, offering an uninterrupted gaming experience. ## Version history (last 5 releases) ### 2026.0823.05 — 2026-08-24 Less confusing "Next" disc (in grayscale so it doesn't conflict with the main disc to be played now). Also some improvements to tutorial for new users. ### 2026.0822.01 — 2026-08-23 Bug fixes and smoother animations ### 2026.0817.02 — 2026-08-18 Now you can see how many games where you have the #1 score, and get notified when someone beats it! ### 2026.0810.10 — 2026-08-11 Earn replay bonuses from long surges! Plus more motivation to improve your Average by completing a "circuit". ### 2026.0803.01 — 2026-08-04 Made the game even moar awesomer. Also put flags on high scores so you can see what country your rivals are in. (Remember you can tap a score for more details.) Have fun with the Spark7 olympics! ## Related topics [spark game](https://appshunter.io/ios/topics/spark-game) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*