Comparison

Spaced Repetition vs Synapse

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

Head to head
About

Spaced Repetition

This app simplifies revision planning with a personalized schedule and timely reminders. It offers a calendar view and customizable intervals, eliminating the need for manual flashcard creation. Focus on learning without the stress of organizing your study plan.

Highlights
  • Personalized revision plan creation
  • Timely revision reminders
  • Intuitive calendar visualization
  • Customizable revision intervals
  • No flashcard creation required
Features
Read full description

Manually organizing and scheduling revisions with spaced repetition can be overwhelming, right? Our spaced repetition planner takes the hassle out of the process, making it effortless to organize your schedule and stay on track with your revisions! With our spaced repetition planner, you can create a personalized revision plan, organize your schedule, and receive reminders—so you can focus on learning instead of planning. Why choose our planner? • Reminders: Never miss a revision again with timely notifications based on your personalized schedule. • No flashcards: Unlike other apps, we keep it simple—no flashcard creation, just an intuitive way to manage your revisions. • Calendar: Visualize your entire revision plan at a glance with our user-friendly calendar. • Customizable intervals: Tailor your revision schedule to suit your needs. Take the hassle out of scheduling and stay on track with our spaced repetition planner! Terms of use: - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policies: - https://www.privacypolicies.com/live/ef430f32-57a4-4a07-b66f-bee2e3df95e9

About

Synapse

Transform your study materials into interactive learning tools. This app generates structured lessons, personalized quizzes, and mind maps from notes, documents, or audio recordings. It offers AI-powered tutoring and spaced repetition for effective memorization and collaborative study features.

Highlights
  • Scan and import notes, documents, and audio
  • AI-generated structured lessons and summaries
  • Personalized quizzes and practice exercises
  • Intelligent spaced repetition for memory retention
  • Collaborative study communities
  • AI tutor for concept explanation and correction
Features
Read full description

Struggling to study? Spending hours on notes that don't help? Synapse turns any lesson into a learning machine. Scan, import, or generate – in 2 seconds - Photo: Snap a picture of your handwritten notes or handouts - Document: Import PDFs, Word docs, or PowerPoints - Audio: Record your teacher and get a complete lesson - AI Generation: Just describe what you want to learn Synapse takes care of everything - Structured lessons with chapters and sub-sections - Smart study guides with definitions, key facts, and mnemonics - Summary mind maps to visualize the entire course - Personalized quizzes: Multiple choice, true/false, fill-in-the-blanks, and more - Audio version to study anywhere A private tutor 24/7 Ask any question about your lesson. The AI knows your content perfectly, explains tough concepts, generates practice exercises on demand, and corrects your mistakes. Study smarter with intelligent spaced repetition Synapse analyzes your performance and automatically schedules your review sessions at the best times for long-term memory. No more last-minute cramming! Learn with your classmates Create communities to share your lessons with friends. Everyone contributes, everyone improves. For all levels, in 18 languages From elementary school to grad school, Synapse adapts to your level. Available in French, English, Spanish, German, Italian, Portuguese, Dutch, Polish, Russian, Arabic, Japanese, Korean, Chinese, Thai, Swedish, Norwegian, Danish, and Finnish. Synapse – Study smart, score high. Confidentialité : https://trysynapse.app/confidentialite Conditions d'utilisation : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Spaced Repetition4 screens
Synapse4 screens

Verdict

The call

The clearest difference is rating: Synapse at 5.0 against Spaced Repetition's 4.3. Synapse also leads on update cadence (every 2 weeks vs monthly). Spaced Repetition's advantage is review sentiment (88% vs 73%). On price, ratings volume, ads and in-app purchases 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. Spaced Repetition sells 3 in-app purchases, starting at $1.99 per month and Synapse sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Synapse holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 6 and 5 respectively. Written reviews complicate that: 88% of Spaced Repetition's written reviews are positive against 73% of Synapse's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Spaced Repetition ships an update monthly, Synapse every 2 weeks. The most recent releases landed on October 30, 2026 and November 8, 2026 respectively.

Scorecard3 real differences · 7 level
Spaced Repetition versus Synapse: the parameters behind the verdict, then further details
ParameterSpaced RepetitionSynapse
PriceFreeFree
Rating4.3 (6 ratings)5.0 (5 ratings) — better
Positive reviews87.5% of reviews — better72.7% of reviews
Number of ratings6 — better5
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size34 MB67 MB
Age rating4+4+
DeveloperSAMUEL PREMJIThe Cooking Company

Customer experience

Spaced Repetition

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

Synapse

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive72.7%
Neutral0.0%
Negative27.3%

In-app purchases

3 purchases

Spaced Repetition

Subscriptions2
  • Monthly subscription$1.991 Month
  • Annual$9.991 Year
One-time1
  • Synapse premium$29.99
3 purchases

Synapse

Subscriptions3
  • Weekly$6.997 Days
  • Monthly$19.991 Month
  • Yearly1 Year trial$99.991 Year

Questions

Is Spaced Repetition free?
Spaced Repetition is free to download, with in-app purchases available.
Is Synapse free?
Synapse is free to download, with in-app purchases available.
Which has better reviews, Spaced Repetition or Synapse?
Synapse is rated higher. Spaced Repetition averages 4.3 out of 5 from 6 ratings, while Synapse averages 5.0 from 5 ratings.
Do Spaced Repetition or Synapse have ads?
Neither Spaced Repetition nor Synapse shows ads.
Which is updated more often, Spaced Repetition or Synapse?
Spaced Repetition ships an update monthly, and Synapse every 2 weeks. Most recently, Spaced Repetition was updated on October 30, 2026 and Synapse on November 8, 2026.

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