Comparison

Planbook Mobile vs Arena by flashcardaudit.com

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

Head to head
About

Planbook Mobile

This is a comprehensive online lesson planning tool designed for educators. It offers a wide array of features, meticulous student learning standards, and excellent support. A free trial is available to experience its capabilities.

Highlights
  • Comprehensive lesson planning
  • Meticulous student learning standards
  • Extensive features for educators
  • Outstanding support and tutorials
  • Continuous improvement based on feedback
Read full description

Welcome to Planbook! With over one million teachers and one billion lessons, Planbook is the established leader in online lesson planning! Why is Planbook preferred by educators? * We offer the most features for teachers and schools * At $20 per year, we offer the best value on the market * Outstanding support plus knowledge base and tutorials * Our student learning standards are meticulous * Our product is always improving thanks to educator feedback Download and take advantage of our 90 day free trial!

About

Arena by flashcardaudit.com

Read full description

One challenge a day. That is the whole ask. Arena is not a study app. It is how you find out whether your studying worked. Every answer earns XP toward your level, and every topic you play becomes a skill with its own tier, so over time you build a profile of what you actually know. The way a game shows a character's stats, except the character is you. HOW A CHALLENGE WORKS A card shows a category, a topic, and how hard the question is. Double-tap to open it: usually four options, one guess, no hints. Then you see the correct answer, a short explanation, the XP it earned, and the ideas your answer moved. IT ADAPTS TO YOU The feed picks what to show you next from how you have been doing, drawing on every level from beginner to specialist. Questions you answer come back later on an FSRS schedule, the same spaced-repetition algorithm Anki uses, timed to just before you would have forgotten them. EVERY TOPIC, ITS OWN TIER Questions come from 22 categories: Life Sciences, Physical Sciences, Medicine and Health, Mathematics, Technology, Engineering, History, Geography, Law and Government, Business and Economics, Psychology and Social Sciences, Philosophy and Religion, Language and Linguistics, Literature, Arts, Film and TV, Music, Gaming, Sports, Food and Drink, Lifestyle and Culture, General Knowledge. Inside them, each topic you play is a skill with a tier from Bronze to Diamond. It rises as you answer well and can slip when you miss or let it fade. Strength in one topic does not cover for weakness in another. GUILDS Create a guild, share the code, and everyone who joins gets a private leaderboard that compares streaks, levels and skill tiers. FREE, AND MEMBERSHIP Arena is free, with a daily limit on challenges. Membership removes the daily limit and gives you a permanent member number based on when you joined. USD 5.99 per month or USD 39.99 per year. It renews automatically until you cancel, and you can cancel anytime in your store's subscription settings. Terms of Use: https://flashcardaudit.com/terms Privacy Policy: https://flashcardaudit.com/privacy

Screenshots

Planbook Mobile4 screens
Arena by flashcardaudit.com4 screens

Verdict

The call

The clearest difference is update cadence: Arena by flashcardaudit.com at every 4 days against Planbook Mobile's every 2 months. Planbook Mobile's advantage is iOS requirement (13.0 vs 15.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Planbook Mobile sells 3 one-off in-app purchases and Arena by flashcardaudit.com sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Planbook Mobile ships an update every 2 months, Arena by flashcardaudit.com every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Planbook Mobile versus Arena by flashcardaudit.com: the parameters behind the verdict, then further details
ParameterPlanbook MobileArena by flashcardaudit.com
PriceFreeFree
Rating4.8 (7.7K ratings) — better—
Positive reviews50.6% of reviews—
Number of ratings7.7K — better—
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size83 MB62 MB
Age rating4+12+
DeveloperPlanbook Inc.Island Cookie Shop LLC

Bugs and requests

Planbook Mobile

Reported bugs

4 issues
  • Unable to add school year dates
  • Login page issues (keyboard blocking screen)
  • Inability to use Gmail account for sign-up
  • Lesson plans deleted without explanation

Requested features

3 requests
  • Add copy and paste feature
  • Improve mobile app experience (e.g., biometric login, portrait mode)
  • Enhance integration with other platforms (e.g., Canvas)

Arena by flashcardaudit.com

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Planbook Mobile

One-time3
  • 1-Year Planbook Subscription$20.00
  • 2-Year Planbook Subscription$36.00
  • 3-Year Planbook Subscription$48.00
2 purchases

Arena by flashcardaudit.com

Subscriptions2
  • Arena Membership$5.991 Month
  • Arena Membership$39.991 Year

Questions

Is Planbook Mobile free?
Planbook Mobile is free to download, with in-app purchases available.
Is Arena by flashcardaudit.com free?
Arena by flashcardaudit.com is free to download, with in-app purchases available.
Do Planbook Mobile or Arena by flashcardaudit.com have ads?
Neither Planbook Mobile nor Arena by flashcardaudit.com shows ads.
Which is updated more often, Planbook Mobile or Arena by flashcardaudit.com?
Planbook Mobile ships an update every 2 months, and Arena by flashcardaudit.com every 4 days. Most recently, Planbook Mobile was updated on November 3, 2026 and Arena by flashcardaudit.com on October 31, 2026.

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