Interview Practice Cards vs SD Primer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Interview Practice Cards
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Practise job interviews like a quick daily game. Interview Practice Cards is a simple, offline‑friendly way to rehearse interview answers out loud. Instead of scrolling through long articles or wrestling with complex AI tools, you draw a card, speak your answer, and rate how fluent you felt. The app tracks your progress with XP, levels, and session reports. Awkward questions show up more often so you can fix weak spots, while fluent questions fade into the background over time. It’s a focused practice routine that fits into a coffee break. How it works Choose a focus like Mixed, Behavioural, Fundamentals, Salary, or Special. Pick how many questions you want to practise (5, 10, or 15). Answer each card out loud – just like in a real interview. Mark your answer as Still awkward, OK, or Fluent. Earn XP and see a session summary at the end. Why it helps Builds muscle memory for real interviews by practising out loud. Keeps you honest about which questions still feel awkward. Turns prep into a small, repeatable habit instead of a last‑minute cram. Key features Card‑based interview practice with a clean, focused design. XP, levels, and stats for a light game‑like feel. Smart repetition: awkward cards appear more often over time. Quick session summaries with fluency breakdowns. No account required, no ads, no subscription. Upgrade once to unlock all cards and practise as much as you like.
SD Primer
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Think like a staff engineer — five minutes a day. SD Primer turns system design mastery into a daily habit. Answer today's questions, debug a broken architecture with your hands, and build the instincts that tech interviews (and real jobs) demand. YOUR DAILY RITUAL • Daily Quiz — five sharp multiple-choice questions on scalability, databases, caching, queues, and trade-offs, with clear explanations for every answer • Focus Practice — we detect your weakest topics and serve extra reps exactly where you need them • Streaks, XP, and levels that make consistency effortless HANDS-ON ARCHITECTURE LABS Don't just read about system design — fix it. Each lab drops you into a live incident: drag components onto the canvas, wire the fix, defend your reasoning, and get scored with strengths and trade-offs. LEARN AI & ML FROM FIRST PRINCIPLES A structured 64-lesson course, one daily read at a time: from the origins of AI through neural networks, transformers, and how to actually use LLMs well — written for software engineers, no math degree required. AND EVERY DAY • Coding pattern drills — name the algorithm behind the problem • Workplace mastery lessons — the soft skills that get engineers promoted • Curated engineering news and daily tips • Your progress, visualized: topic strength, consistency calendar, achievements SD PRIMER PRO Unlock custom quizzes, labs, and pattern sessions tuned to your goals, plus higher daily limits. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the period; manage anytime in your App Store account settings. Privacy Policy: https://sdprimer.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Start today. Your future self at the whiteboard will thank you.
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Verdict
The clearest difference is iOS requirement: Interview Practice Cards at 12.0 against SD Primer's 17.0. On price, ads, 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
Both are free to download. Interview Practice Cards sells 1 one-off in-app purchase and SD Primer sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Interview Practice Cards | SD Primer |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 45 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | 嘉炜 丰 | Ernesto Hilvano |
In-app purchases
Interview Practice Cards
- Lifetime Unlock all Features$9.99
SD Primer
- SDPrimer Pro$9.991 Month
- SDPrimer Pro$99.991 Year





