Comparison

Tavio vs System Design Refresher

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

Head to head
About

Tavio

Features
Read full description

Train your brain, test your knowledge, and improve yourself every day. Tavio is a free knowledge and brain training app designed for curious minds. Practice yourself through engaging quizzes, strengthen your memory, and stay focused while learning something new every day. Learn Without Limits With 10,000+ high-quality questions across 50+ diverse topics, Tavio helps you practice knowledge in a fun and natural way. Whether you want to test knowledge, challenge your brain, or simply enjoy trivia, Tavio makes learning enjoyable. Play daily, improve yourself, and keep your mind active โ€” all without subscriptions. Smart Learning, Endless Discovery Tavio brings together education, entertainment, and brain training in one place. Explore a wide variety of topics, improve memory and focus, and challenge your IQ through carefully designed quizzes. Learning in Tavio feels like Netflix-style discovery โ€” but for knowledge. Key Features 10,000+ questions 50+ diverse and expanding topics Unlimited quiz access Improve memory, focus, and thinking skills Practice knowledge anytime, anywhere Designed for learning, fun, and brain tests Free to play Who Is Tavio For? Tavio is perfect for students, trivia lovers, pop culture fans, and anyone who wants to practice yourself, test knowledge, and improve IQ in a fun way. Practice. Learn. Improve. Make learning part of your daily routine. Train your brain, test your knowledge, and enjoy unlimited learning challenges. Download Tavio: Practice Knowledge and start learning today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

System Design Refresher

Features
Read full description

System Design Refresher is a free study companion for software engineers preparing for system design interviews. WHAT'S INSIDE โ€ข 30+ system design articles covering distributed systems, databases, caching, and more โ€ข Engineering blogs from top tech companies (Google, Meta, Stripe, Airbnb, and more) aggregated in one place โ€ข AI-powered flashcards with spaced repetition โ€ข Ask AI to summarize or explain any article in plain language โ€ข Favorites, reading progress tracking, and custom RSS feeds FEATURES โ€ข Works offline โ€” articles download for reading without internet โ€ข Dark mode, font customization, and text size controls โ€ข Face ID / Touch ID lock for privacy โ€ข Sign in with Google or Apple, or use as a guest with no account required

Screenshots

Tavio4 screens
System Design Refresher4 screens

Verdict

The call

The clearest difference is in-app purchases: System Design Refresher at none against Tavio's 3. Tavio's advantage is update cadence (every 8 days vs monthly) and iOS requirement (13.0 vs 26.2). On price, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Tavio sells 3 in-app purchases, starting at $4.99 per month. System Design Refresher asks for nothing beyond the download.

UpkeepUpdate frequency

Tavio ships an update every 8 days, System Design Refresher monthly. The most recent releases landed on October 19, 2026 and September 30, 2026 respectively.

Scorecard3 real differences ยท 3 level
Tavio versus System Design Refresher: the parameters behind the verdict, then further details
ParameterTavioSystem Design Refresher
PriceFreeFree
Update frequencyEvery 8 days โ€” betterMonthly
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS13.0 โ€” better26.2
Further details โ€” not scored
Size69 MB18 MB
Age rating4+4+
DeveloperRashad ShirizadaSaurabh Sharma

In-app purchases

3 purchases

Tavio

Subscriptions2
  • Monthly$4.991 Month
  • Yearly Subsciption$39.991 Year
One-time1
  • 50 Hearts Pack$0.99
None

System Design Refresher

No in-app purchases

Questions

Is Tavio free?
Tavio is free to download, with in-app purchases available.
Is System Design Refresher free?
System Design Refresher is free to download, with no in-app purchases.
Do Tavio or System Design Refresher have ads?
Neither Tavio nor System Design Refresher shows ads.
Which is updated more often, Tavio or System Design Refresher?
Tavio ships an update every 8 days, and System Design Refresher monthly. Most recently, Tavio was updated on October 19, 2026 and System Design Refresher on September 30, 2026.

Other comparisons