Comparison

Devmaxx vs Ohmie

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Devmaxx

This app provides a daily system design question to help software engineers learn and practice essential skills for interviews and career growth. It offers clear explanations, linked resources, progress tracking, and a community forum for collaborative learning.

Highlights
  • Daily system design questions
  • Clear explanations and answer breakdowns
  • Linked learning resources
  • Access to previous questions
  • Progress tracking
  • Private developer community
  • Pod-based learning and competition
Features
Read full description

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 • Join your friends in pods and battle against other pods while learning system design. 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/

About

Ohmie

Learn electronics through engaging, game-like lessons and interactive circuit simulations. Master concepts from basic circuits to embedded systems and programming with a structured curriculum and gamified progress tracking. The app offers hints and tracks your learning journey across devices.

Highlights
  • Interactive circuit simulations
  • Game-like lessons
  • Learn electronics, physics, and programming
  • Gamified progress tracking (XP, badges, streaks)
  • Ask Ohmie for hints
  • Cross-device progress syncing
Features
Read full description

Pass circuits. 3 minutes a day. Ohmie teaches electronics the way you'd learn a language: short, game-like lessons you actually solve, not paragraphs you skim. Lessons are read aloud, so your eyes stay on the circuit. Everything below is part of Ohmie Pro, an auto-renewing subscription. Details are in OHMIE PRO SUBSCRIPTION at the end. REAL PRACTICE • Live circuit sims: stack battery cells, dim an LED, watch current respond to resistance • Build schematics by dragging real components into place • Decode resistor color bands, spot the broken circuit, order the steps • Miss a question? It comes back in Practice until it sticks. That's the method, not a penalty. LEARN THE FULL PATH • Electronics: charge, current, voltage, Ohm's law, series and parallel, capacitors, power, analog, then transistors, logic gates and an 8-bit computer you can run, pause and step through • Physics: charge, electric fields, Gauss's law, potential, capacitors, circuits, magnetism and induction • Embedded systems: GPIO, timers, PWM, ADC, interrupts, serial protocols, build a device • Robotics: sensors, motors, PID control, build a line-following racer • PCB design: schematics, layout, routing, production • Programming: Python, and C++ for Arduino MOMENTUM THAT FORGIVES XP, streaks, daily quests, 28 badges to earn, skins to unlock, leaderboards, and a mascot named Ohmie who reacts to every answer and is on your side. Streaks are forgiving. Life happens. Stuck? Ask Ohmie and get a hint in plain words. No ads. Learn in English, Spanish or German. Sign in to keep your progress across devices. OHMIE PRO SUBSCRIPTION Ohmie is free to download. The lessons, practice, circuit sims, Ask Ohmie and everything else described above require an Ohmie Pro subscription, billed monthly or yearly. The yearly plan starts with a free trial for eligible new subscribers. Prices are shown in the app before you buy. Payment is charged to your Apple Account. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel it any time in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ohmie.io/privacy

Screenshots

Devmaxx4 screens
Ohmie4 screens

Verdict

The call

The clearest difference is monetization model: Ohmie at free with in-app purchases against Devmaxx's subscription. Ohmie also leads on review sentiment (48% vs 18%) and update cadence (every 3 days vs every 11 days). Devmaxx's advantage is ads (none vs shown) and iOS requirement (17.5 vs 26.2). On price, ratings volume, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Devmaxx sells 2 in-app purchases, starting at $8.99 per month and Ohmie sells 5 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Ohmie holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 545 and 376 respectively. Written reviews point the same way: 18% of Devmaxx's written reviews are positive against 48% of Ohmie's.

UpkeepUpdate frequency

Devmaxx ships an update every 11 days, Ohmie every 3 days. Both last shipped on November 13, 2026.

Scorecard7 real differences · 4 level
Devmaxx versus Ohmie: the parameters behind the verdict, then further details
ParameterDevmaxxOhmie
PriceFreeFree
Rating4.3 (545 ratings)4.5 (376 ratings) — better
Positive reviews17.5% of reviews48.5% of reviews — better
Number of ratings545 — better376
Update frequencyEvery 11 daysEvery 3 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
Best chart rank—#59 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.5 — better26.2
Further details — not scored
Size40 MB707 MB
Age rating12+4+
DeveloperArjay McCandless LLCOHMIE LLC

Customer experience

Devmaxx

All ratings545 ratings
Positive82.9%
Neutral0.9%
Negative16.1%
Written reviews57 reviews
Positive17.5%
Neutral7.0%
Negative75.4%

Ohmie

All ratings372 ratings
Positive86.3%
Neutral3.5%
Negative10.2%
Written reviews66 reviews
Positive48.5%
Neutral10.6%
Negative40.9%

In-app purchases

2 purchases

Devmaxx

Subscriptions2
  • Monthly Devmaxx Subscription7 Days trial$8.991 Month
  • Annual Devmaxx Subscription7 Days trial$59.991 Year
5 purchases

Ohmie

Subscriptions5
  • Ohmie Pro$7.991 Month
  • Ohmie Pro Yearly Saver$19.991 Year
  • Ohmie Pro Annual$29.991 Year
Show 2 more
  • Ohmie Pro7 Days trial$29.991 Year
  • Ohmie Pro7 Days trial$49.991 Year

Questions

Is Devmaxx free?
Devmaxx is free to download, with in-app purchases available.
Is Ohmie free?
Ohmie is free to download, with in-app purchases available.
Which has better reviews, Devmaxx or Ohmie?
Ohmie is rated higher. Devmaxx averages 4.3 out of 5 from 545 ratings, while Ohmie averages 4.5 from 376 ratings.
Do Devmaxx or Ohmie have ads?
Ohmie shows ads; Devmaxx does not.
Which is updated more often, Devmaxx or Ohmie?
Devmaxx ships an update every 11 days, and Ohmie every 3 days. Most recently, Devmaxx was updated on November 13, 2026 and Ohmie on November 13, 2026.

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