MARVLS vs Unit Gacha !
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MARVLS
Explore quantum computing concepts through interactive augmented reality models. Requires a Merge Cube to visualize and manipulate topics like superposition and entanglement. Navigate through various educational modules to deepen your understanding.
- Augmented reality visualization
- Interactive quantum concepts
- Merge Cube integration
- Topics: superposition, entanglement, qubits
- Logic gates visualization
- Nuclear and electron spin models
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View augmented reality models of quantum computing concepts through your phone. You'll need a Merge Cube (link included to download). Click on different button to navigate to different topics. Tap the camera icon and point your camera towards the Merge Cube to visualize and interact with our MARVLS. Topics include observer dependency, superposition, entanglement, bits, qubits, nuclear and electron spin, logic gates, and trapped ions. Developer support provided by Leo Vanderlofske.
Unit Gacha !
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◆ Learn Physics Units with a Fun Gacha System Physics Units Gacha lets you practice unit breakdown, unit conversions, and fundamental physical quantities through randomly generated problems. Just tap to get a new question and continue learning at your own pace. ◆ Covers Essential Physics Units Practice and review a wide range of physics units: Mechanics (force, energy, momentum, pressure) Electricity & magnetism (voltage, resistance, charge, field strength) Waves & thermodynamics Derived units SI base units & physical constants Designed for students who want to study physics through units. ◆ Focused Explanations Where Needed Some problems include short explanations that show how units are derived from formulas. ◆ Random Practice Questions are generated randomly, allowing you to encounter various unit patterns and practice repeatedly. ◆ Simple Learning Features In-app scratch paper Learning progress is saved locally, and can be synchronized to the cloud when you sign in. Suitable for both quick review and focused practice sessions. ◆ For High-School Physics & Introductory University Courses A learning app designed to support the study of physics units for exams and fundamental review. ◆ Free to Use (Optional Paid Content) Approximately 70 problems are available for free Additional problem sets are available as optional paid upgrades
Screenshots
Verdict
The clearest difference is in-app purchases: MARVLS at none against Unit Gacha !'s 2. Unit Gacha !'s advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, 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. Unit Gacha ! sells 2 one-off in-app purchases. MARVLS asks for nothing beyond the download.
MARVLS ships an update every 4 weeks, Unit Gacha ! every 3 weeks. The most recent releases landed on September 9, 2026 and June 19, 2026 respectively.
| Parameter | MARVLS | Unit Gacha ! |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 168 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Michele McColgan | Shunsuke Nakamura |
In-app purchases
MARVLS
No in-app purchases
Unit Gacha !
- Unlock all mechanics problems$5.99
- Unlock all electromagnetic problems$5.99
