Devmaxx vs Variance
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Devmaxx
This app provides a daily system design question to help software engineers master essential skills for interviews and career growth. It offers clear explanations, linked resources, and a private community for learning and practice.
- Daily system design questions
- Clear explanations and answer breakdowns
- Linked learning resources
- Access to previous questions
- Private developer community
- Progress tracking
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System design is becoming one of the most important skills for software engineers. Many companies now require a dedicated system design interview, and your career growth often depends on your ability to design large-scale systems. Devmaxx gives you one focused system design question every day across databases, infrastructure, APIs, theory, and product to help you learn these skills and stay sharp. Each question takes about two minutes, and includes a resource to learn more about the subject. What you’ll get: • A new system design question daily • Clear explanations for every answer • Breakdown of the correct answer • Access to previous questions • Linked resources to go deeper • Access to a private community of developers learning and building the same things as you • Progress tracking to monitor growth If you’re preparing for interviews, this builds daily momentum. If you’re already working as an engineer, this keeps your fundamentals sharp. Open the app. Answer one question. Land the offer. * All features described above require a subscription Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Variance
Prepare for quantitative finance interviews with this app. Practice probability, mental math, logic puzzles, and more with detailed solutions and progress tracking. Sharpen your mathematical intuition and problem-solving skills for trading and research roles.
- Probability practice
- Mental math exercises
- Logic puzzles
- Detailed solutions
- Progress tracking
- Topic-specific practice
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Variance is the ultimate quant interview prep app for aspiring traders, quant researchers, and finance professionals. Whether you're targeting a role at a hedge fund, trading firm, or just prepping for fun, Variance gives you the tools to practice the quantitative skills that top firms test — rigorously and on the go. WHAT YOU'LL PRACTICE • Probability • Mental math • Sequences & Patterns • Brainteasers & logic puzzles • Expected value FEATURES • Hundreds of problems across multiple difficulty levels • Detailed solutions and explanations for every question • Topic-by-topic practice to target your weak spots • Progress tracking to see how you improve over time • Clean, distraction-free interface built for focused study WHO IT'S FOR Variance is built for students and professionals preparing for quantitative interviews at top firms, and other top quant shops. It's also great for anyone who wants to sharpen their mathematical intuition and problem-solving speed. Prepare smarter. Interview with confidence. Download Variance today. Terms of Use: www.thequantprepapp.com/terms Privacy Policy: www.thequantprepapp.com/privacy
Screenshots
Verdict
The clearest difference is review sentiment: Variance at 100% against Devmaxx's 21%. Variance also leads on rating (5.0 vs 4.4) and monetization model (freemium vs subscription). Devmaxx's advantage is ratings volume (495 vs 5) and iOS requirement (17.5 vs 26.0). On price, update cadence, ads and in-app purchases 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. Devmaxx sells 2 in-app purchases, starting at $8.99 per month and Variance sells 2 in-app purchases, starting at $24.99 per month. Whichever you choose, the download price is not the number that matters.
Variance holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Devmaxx has 495 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 21% of Devmaxx's written reviews are positive against 100% of Variance's.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.
| Parameter | Devmaxx | Variance |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (495 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 20.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 495 — better | 5 |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Freemium — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.5 — better | 26.0 |
| Further details — not scored | ||
| Size | 26 MB | 18 MB |
| Age rating | 12+ | 12+ |
| Developer | Arjay McCandless LLC | Benjamin Kawano |
Customer experience
Devmaxx
Variance
In-app purchases
Devmaxx
- Monthly Devmaxx Subscription7 Days trial$8.991 Month
- Annual Devmaxx Subscription7 Days trial$59.991 Year
Variance
- Variance Pro Monthly$24.991 Month
- Variance Pro Yearly$99.991 Year
