Comparison

Knowunity vs Sapium

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

Head to head
About

Knowunity

This AI-powered learning companion creates personalized study plans for exams and homework. It transforms uploaded materials into study tools like flashcards and quizzes, and offers AI-scored mock exams. Connect with a community of students for shared notes and practice.

Highlights
  • Personalized AI study plans
  • Flashcards and quizzes
  • Voice recall and AI tutor chat
  • Homework problem solver
  • Material conversion to study tools
  • AI-scored mock exams
  • Community notes and solutions
Features
Read full description

Hey, I'm Knowie - your new way of learning. Whatever you're working on, I'll help you understand it, remember it, and walk into your next SAT, ACT, or AP feeling ready. 30 million students already study with me, I am created by the best students and the core tools are free. This is a the new way of learning - here is how we do it. Everything runs through one place: your exam plan. Instead of a pile of separate features, I pull it all together - flashcards, quizzes, summaries, mock exams, voice practice, and the official SAT, ACT, and AP guidelines - and structure it into a day-by-day plan built around your test date and your topics. Your exam plan, made with you. Tell me when your test is and what you need to cover, and I'll map out exactly what to do each day, with the right notes and flashcards for your course. Add your class timetable and I'll fit study around your lessons - no all-nighters. As the test gets closer the plan adapts, and you always see what you've got down and what's next. Study that actually sticks - active recall. Rereading feels productive but fades fast, so your plan is built around active recall: pulling answers out of your own memory. Quizzes and flashcards ask you to remember, not just recognize, and mastery tracking shows each topic move from shaky to solid. Just say it out loud. This is where voice comes in. With voice recall in your plan, you say your answer from memory and I check it with you - hands-free, out loud, the way real recall works. And in chat, switch on voice mode to talk to me like a tutor: ask anything, no typing needed. Stuck on homework? Snap a photo of any problem - math, chemistry, physics, biology - and I'll walk you through it step by step, so you get the how, not just the answer. Keep a separate chat for each class so nothing gets mixed up. Turn anything into study material. Upload PDFs, slides, photos, or handwritten notes, paste in text and links, bring your old flashcard decks, or drop in a YouTube video - I'll turn it into flashcards, quizzes, and clean summaries in seconds, ready to slot straight into your plan. Need vocab for a language class or a clearer essay outline? I've got you there too. Practice like it's the real thing. Take full, AI-scored mock exams in real SAT and AP format and see where you stand before test day - then I fold the results back into your plan, so you review exactly what needs work. Learn from real students. Browse over 1 million notes, summaries, and past-paper solutions shared by students in your subject and grade - right alongside everything we make together. Keep your streak going. Earn XP as you study, join a weekly league of up to 30 classmates, and climb from Bronze to Gold. A little friendly competition to keep you coming back. I'm built for every subject - AP courses, Math, Sciences, Social Studies, English, World Languages, Computing, and SAT and ACT prep. Whether you're cramming tonight or planning weeks ahead, we'll get you there - and the core tools are always free. Ready when you are. Download Knowunity, and let's study smarter, not harder. TOS: https://knowunity.com/legal/tos

About

Sapium

Transform idle time into learning with bite-sized ideas from books, podcasts, and essays. Enjoy personalized content, build an idea library, and listen on the go. Gamified features encourage daily learning.

Highlights
  • Bite-sized ideas from books and podcasts
  • Personalized content feed
  • Save and organize ideas
  • Audio mode for learning on the go
  • Gamified learning with streaks and XP
  • AI assistant for deeper insights
  • Available in 12 languages
Features
Read full description

Ditch the endless scroll. Sapium turns that same idle time into real learning: swipe up and discover powerful ideas from the world's best books, podcasts and essays — in seconds. LEARN THE WAY YOU ENJOY SOCIAL MEDIA The same format you already know, now working for your mind. Every card is one transformative idea, drawn from titles like Atomic Habits, How to Win Friends and Influence People, The Power of Now and many more. Read what interests you. Skip what doesn't. PERSONALIZED FOR YOU • Pick your favorite topics: productivity, philosophy, neuroscience, finance, leadership and more. • Your feed gets better with every swipe thanks to smart recommendations. • Discover ideas that genuinely click with you. BUILD YOUR IDEA LIBRARY • Save the ideas that hit hardest with a single tap. • Organize your knowledge into themed collections. • Follow your favorite sources and reach their ideas from your profile. • Get to your library even when you're offline. LISTEN WHILE YOU LIVE • Audio mode: queue up ideas and learn while you walk, drive or train. • Like an audiobook, but only the essential part. • Focus music plus binaural and ambient sounds for distraction-free reading. KEEP THE STREAK, GROW EVERY DAY • Streaks and experience points (XP) make the learning habit irresistible. • Customizable reminders for your time of day. • Progress stats that show you how far you've come. GO DEEPER WHENEVER YOU WANT Every card is just the beginning. Your AI assistant helps you dig into any idea instantly, with context, examples and reflections that go beyond the summary. AVAILABLE IN 12 LANGUAGES English, Spanish, Portuguese, German, French, Italian, Hindi, Turkish, Polish, Indonesian, Japanese and Dutch. Download Sapium and turn every spare moment into a chance to learn.

Screenshots

Knowunity4 screens
Sapium4 screens

Verdict

The call

The clearest difference is in-app purchases: Sapium at none against Knowunity's 10. Sapium also leads on rating (5.0 vs 4.7). Knowunity's advantage is update cadence (daily vs fortnightly) and ratings volume (13K vs 1). On price, ads, device support and iOS requirement 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. Knowunity sells 10 in-app purchases, starting at $4.99 per 7 days. Sapium asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sapium holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Knowunity has 13K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Knowunity ships an update daily, Sapium fortnightly. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 5 level
Knowunity versus Sapium: the parameters behind the verdict, then further details
ParameterKnowunitySapium
PriceFreeFree
Rating4.7 (13K ratings)5.0 (1 ratings) — better
Positive reviews82.3% of reviews—
Number of ratings13K — better1
Update frequencyDaily — betterFortnightly
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
Best chart rank#9 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.515.1 — better
Further details — not scored
Size238 MB70 MB
Age rating4+4+
DeveloperKnowunity GmbHCristian Banuls Mahiques

Customer experience

Knowunity

All ratings13,416 ratings
Positive93.6%
Neutral2.7%
Negative3.7%
Written reviews1,369 reviews
Positive82.3%
Neutral5.3%
Negative12.3%

Sapium

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Knowunity

Reported bugs

4 issues
  • Frequent app crashes and freezes
  • Issues with uploading and saving notes
  • Problems with group chat functionality
  • Inconsistent behavior when navigating the app

Requested features

4 requests
  • Add more advanced class options
  • Improve search and organization of notes
  • Implement a draft feature for creating study materials
  • Add more customization options

Sapium

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Knowunity

Subscriptions10
  • Knowunity Lite$4.997 Days
  • Knowunity Max$14.997 Days
  • Knowunity Max$23.991 Month
Show 7 more
  • Knowunity Pro$25.993 Months
  • Knowunity Lite$29.991 Year
  • Knowunity Pro$29.993 Months
  • Knowunity Pro$33.993 Months
  • Knowunity Pro3 Months trial$49.991 Year
  • Knowunity Pro$61.991 Year
  • Knowunity Max$74.991 Year
None

Sapium

No in-app purchases

Questions

Is Knowunity free?
Knowunity is free to download, with in-app purchases available.
Is Sapium free?
Sapium is free to download, with no in-app purchases.
Which has better reviews, Knowunity or Sapium?
Sapium is rated higher. Knowunity averages 4.7 out of 5 from 13K ratings, while Sapium averages 5.0 from 1 ratings.
Do Knowunity or Sapium have ads?
Both Knowunity and Sapium show ads.
Which is updated more often, Knowunity or Sapium?
Knowunity ships an update daily, and Sapium fortnightly. Most recently, Knowunity was updated on November 11, 2026 and Sapium on October 31, 2026.

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