Bolt Stack vs Dr. Hole
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Bolt Stack
Engage your mind with a challenging puzzle game where you must sort nuts correctly to advance through increasingly difficult levels. This brainy experience offers a fun way to test your skills and enhance your cognitive abilities.
- Nut sorting gameplay
- Progressive level difficulty
- Brain-challenging puzzles
- Skill testing
- Mind enhancement
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In this fun and brainy game, try to sort the nuts correctly to finish the levels. Each level will challenge your brain with increasing difficulty. Test your skills with levels that progress from easy to hard. Enjoy and enhance your mind with the nut sorting game!
Dr. Hole
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You are Dr. Hole, a mad scientist who built a portable black hole, and you're running one experiment on the whole planet: consume it, city by city, before the time catches up. A WORLD TOUR Travel across Manila, New York, Ho Chi Minh City, Tokyo, and Seoul each with its own props, from Manila street food to city skylines. Clear a region and bank Dark Matter to fund your next run. REBUILD THE PUZZLES Every region hides a jigsaw puzzle. Clear levels to collect the pieces to complete it! COMBOS GO CRAZY Find the optimal path to complete the levels to keep the combo up, some levels are impossible to clear "leisurely" routes.
Screenshots
Verdict
The clearest difference is in-app purchases: Dr. Hole at none against Bolt Stack's 16. Bolt Stack's advantage is update cadence (every 8 days vs every 3 weeks) and iOS requirement (13.0 vs 15.0). On price, ads 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. Bolt Stack sells 16 one-off in-app purchases. Dr. Hole asks for nothing beyond the download.
Bolt Stack ships an update every 8 days, Dr. Hole every 3 weeks. The most recent releases landed on October 6, 2026 and October 17, 2026 respectively.
| Parameter | Bolt Stack | Dr. Hole |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (65 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 65 — better | — |
| Update frequency | Every 8 days — better | Every 3 weeks |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 365 MB | 272 MB |
| Age rating | 4+ | 4+ |
| Developer | HOMA GAMES | SUNSIN YAZILIM ANONIM SIRKETI |
In-app purchases
Bolt Stack
- Out of Lives$0.99
- Good Deal$1.99
- Some Coins$1.99
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- Life Rush$3.99
- Starter Pack$4.99
- Hard Level Fail Offer$5.99
- Fail Offer$5.99
- No-Ads$6.99
- Out of Lives$6.99
- Good Deal$7.99
- Pile of Coins$7.99
- Life Rush$9.99
- No-Ads Bundle$11.99
- Heap of coins$14.99
- Bag of Coins$29.99
- Chest of Coins$99.99
Dr. Hole
No in-app purchases
