NextDigit vs Rube’s Lab
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
NextDigit
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Think fast. Solve faster. Next Digit is a fast-paced math puzzle game that pushes your mental speed and accuracy to the limit. Tackle quick math challenges, improve your reaction time, and build your streak as the difficulty increases. Features: • Smooth and responsive gameplay • Multiple difficulty levels • Instant feedback for every answer • High score tracking • Minimal, distraction-free design Perfect for quick sessions or long streaks, Next Digit keeps your brain active and engaged.
Rube’s Lab
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Welcome to Rube’s Lab — a physics puzzle game where creativity beats brute force. Build clever contraptions, trigger satisfying chain reactions, and solve levels using logic, timing, and real physics. Create, test, improve Every level is a small laboratory. Place objects, connect mechanisms, and experiment until your setup works. Want a clean solution or a wild one? Both are valid. Features Physics-based puzzle gameplay with realistic interactions Contraption building: combine tools to create chain reactions Hundreds of ways to solve: experiment with multiple solutions Smart difficulty curve: approachable early levels, brainy later challenges Hint system when you’re stuck (optional) Satisfying reactions: knock, roll, bounce, push, trigger! For fans of If you enjoy physics puzzles, logic games, brain teasers, and creative building, you’ll feel at home in Rube’s Lab. Download and start inventing.
Screenshots
Verdict
The clearest difference is in-app purchases: NextDigit at none against Rube’s Lab's 7. NextDigit also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). 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. Rube’s Lab sells 7 one-off in-app purchases. NextDigit asks for nothing beyond the download.
| Parameter | NextDigit | Rube’s Lab |
|---|---|---|
| Price | Free | Free |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 21 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | BK Kejera | Volodymyr Bouland |
In-app purchases
NextDigit
No in-app purchases
Rube’s Lab
- 20 Gems$0.99
- 100 Gems$1.99
- 200 Gems$2.99
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- Starter Pack$2.99
- Pro Version$2.99
- 500 Gems$3.99
- 1000 Gems$4.99









