Bolt Stack vs FENER
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!
FENER
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One room. One light. Three questions. FENER is a calm puzzle game built on the geometry of light. Walls cast shadows; you place the light, block it, or hide from it. THREE CHAPTERS • LANTERN — place lanterns, leave no corner dark • CURTAIN — draw curtains, cut the protected ones off from the light • HIDDEN — predict the shadows while the lights are off, then flip the switch WHY FENER? • Endless levels, each generated by algorithm with mathematically guaranteed solvability • Levels are identical for everyone: your level 23 is your friend's level 23 • A fair star leaderboard on Game Center • Fully offline; no ads, no accounts, no data collection • No timers, no penalties — just you, the light, and the shadow • Subtle haptics and a quiet soundtrack A five-minute break or a long evening. Light is a gentle teacher.
Screenshots
Verdict
The clearest difference is in-app purchases: FENER at none against Bolt Stack's 16. FENER also leads on ads (none vs shown) and update cadence (every 3 days vs every 8 days). Bolt Stack's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.6). On price 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. FENER asks for nothing beyond the download.
Bolt Stack ships an update every 8 days, FENER every 3 days. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.
| Parameter | Bolt Stack | FENER |
|---|---|---|
| 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 | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 365 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | HOMA GAMES | ismail alkan |
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
FENER
No in-app purchases
