Mahjong Stack Quest vs ScrewNut Lab
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Mahjong Stack Quest
A fast-paced mahjong puzzle game where players must quickly identify and replace incorrect tiles drifting down the screen. Aim and fire replacements to complete mahjong hands before time runs out.
- Fast-paced mahjong gameplay
- Classic hand recognition
- Precise aiming action
- Tile replacement mechanic
- Multiple difficulty levels (Easy, Hard, Devil)
- Time-based challenges
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Mahjong Stack Quest Mahjong Stack Quest is a fast-paced mahjong puzzle that blends classic hand recognition with precise aiming action. Fourteen tiles drift downward from the top of the screen. Some are wrong on purpose. Spot the mistakes, pick replacements from the candidate tray, aim at the correct column, and fire before the row hits the deadline. Choose Easy, Hard, or Devil to match your skill. Just focus, sharp eyes, and satisfying shots. Spot. Fire. Complete the Hand. Open Mahjong Stack Quest and finish the hand before time runs out.
ScrewNut Lab
Engage in a physics-based puzzle game where you assemble mechanical components. Manipulate nuts, bolts, and tools, observing their interactions with friction, vibration, and heat to solve experiments. Focus on visual and tactile feedback to understand complex mechanical systems.
- Mechanical assembly puzzles
- Realistic physics simulation
- Friction, vibration, and heat mechanics
- Visual and tactile feedback
- Interactive rigs for experimentation
- System-based problem solving
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ScrewNut Lab ScrewNut Lab turns mechanical assembly into a hands-on physics puzzle. Enter a workshop where every nut, bolt, washer, and tool responds to friction, vibration, heat, pressure, and resonance. Observe each target, choose your equipment, operate the rig, run a test, study the clues, and refine your setup until the experiment succeeds. ScrewNut Lab favors sound, color, motion, haptic response, deformation, and traces over crowded numerical displays.Many distinct interactive rigs help observation and controlled gestures. Discover why lower resistance is not always safer, tighter is not always stronger, and the best solution comes from understanding the system.
Screenshots
Verdict
The clearest difference is review sentiment: ScrewNut Lab at 100% against Mahjong Stack Quest's 0%. ScrewNut Lab also leads on rating (5.0 vs 2.4). On price, ratings volume, update cadence 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. Neither carries in-app purchases, so what you see is what you pay.
ScrewNut Lab holds the better App Store score, 5.0 against 2.4. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews point the same way: 0% of Mahjong Stack Quest's written reviews are positive against 100% of ScrewNut Lab's.
Mahjong Stack Quest ships an update fortnightly, ScrewNut Lab every 2 weeks. Both last shipped on October 8, 2026.
| Parameter | Mahjong Stack Quest | ScrewNut Lab |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (5 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 — better | 4 |
| Update frequency | Fortnightly — better | Every 2 weeks |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 369 MB | 384 MB |
| Age rating | 4+ | 4+ |
| Developer | 洁 周 | 佩龙 孟 |
Customer experience
Mahjong Stack Quest
ScrewNut Lab
In-app purchases
Mahjong Stack Quest
No in-app purchases
ScrewNut Lab
No in-app purchases
Questions
Is Mahjong Stack Quest free?
Is ScrewNut Lab free?
Which has better reviews, Mahjong Stack Quest or ScrewNut Lab?
Do Mahjong Stack Quest or ScrewNut Lab have ads?
Which is updated more often, Mahjong Stack Quest or ScrewNut Lab?
Other comparisons
