Comparison

Epi Tools vs Cogni

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

Head to head
About

Epi Tools

This app provides a suite of epidemiological calculation tools for disease frequency, association, and effect measures. It also includes sample size calculators, diagnostic test validation, and a comprehensive glossary of terms.

Highlights
  • Measures of disease frequency with confidence intervals
  • Measures of association and effect
  • Sample size calculators
  • Diagnostic test validation
  • Post-test probability estimation
  • Random number generator
  • Epidemiology glossary
Features
Read full description

Functions include measures of disease frequency (including confidence intervals for prevalence, incidence risk and incidence rates), measures of association and measures of effect (from 2 × 2 table data), various sample size calculators, diagnostic test validation, estimation of the post-test probability of disease, a random number generator and a comprehensive epidemiology glossary.

About

Cogni

This app uses AI to generate flashcards from various sources like PDFs, notes, and lecture recordings. It employs spaced repetition with the FSRS algorithm to optimize memorization and allows for Anki deck import. Study notes can be generated alongside cards, and a library of pre-made decks is available.

Highlights
  • AI flashcard generation
  • FSRS spaced repetition
  • Anki deck import
  • Integrated study notes
  • Offline study mode
  • Library of pre-made decks
Read full description

Cogni is a flashcard app with FSRS spaced repetition, AI flashcard generation and Anki deck import. Study on iPhone, iPad, Android and the web: your decks and progress sync through one account, and reviews work offline. MAKE FLASHCARDS WITH AI Upload a PDF, photograph your notes or textbook pages, upload a lecture recording, paste text or type a topic. Cogni drafts question-and-answer and cloze cards. You check the drafts and keep the ones you want. FSRS SPACED REPETITION Every card is scheduled with FSRS, the open-source algorithm that predicts when you are about to forget. After each answer, rate your recall (Again, Hard, Good or Easy) and see when the card comes back. Each day you review only what is due. IMPORT YOUR ANKI DECKS Save an .apkg file in Files, tap + in Cogni and choose “Import .apkg”. Cards, subdecks, cloze cards, images and audio come with it. Anki's review history stays in Anki: FSRS builds a new schedule from your answers in Cogni. NOTES NEXT TO YOUR CARDS Generate study notes together with your cards and read them in Cogni on the web, linked to the cards they produced. READY-MADE DECKS Browse a library of 5,000+ decks for languages, medicine, anatomy and more, add a deck and start studying. BUILT FOR - Medical, nursing and pre-med students - Language learners building vocabulary - Students preparing for exams - Anyone moving their decks from another flashcard app FREE TO START Create cards, import decks, sync and study up to 40 card reviews a day for free, and try one AI generation. Cogni Premium removes the daily review limit, adds text-to-speech and includes AI generation within your plan's allowance. Terms of Use: https://cogni.cards/terms/ Privacy Policy: https://cogni.cards/privacy/

Screenshots

Epi Tools4 screens
Cogni4 screens

Verdict

The call

The clearest difference is review sentiment: Epi Tools at 100% against Cogni's 36%. Epi Tools also leads on in-app purchases (none vs 9) and rating (5.0 vs 4.7). Cogni's advantage is update cadence (weekly vs every 2 months) and ratings volume (1.7K vs 1). On price, ads 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. Cogni sells 9 in-app purchases, starting at $4.99 per month. Epi Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Epi Tools holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Cogni has 1.7K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Epi Tools's written reviews are positive against 36% of Cogni's.

UpkeepUpdate frequency

Epi Tools ships an update every 2 months, Cogni weekly. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

Scorecard7 real differences · 3 level
Epi Tools versus Cogni: the parameters behind the verdict, then further details
ParameterEpi ToolsCogni
PriceFreeFree
Rating5.0 (1 ratings) — better4.7 (1.7K ratings)
Positive reviews100.0% of reviews — better35.8% of reviews
Number of ratings11.7K — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.4 — better16.4
Further details — not scored
Size19 MB76 MB
Age rating12+4+
DeveloperMark StevensonCOGNIFLY LTD

Customer experience

Epi Tools

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Cogni

All ratings1,690 ratings
Positive92.8%
Neutral2.7%
Negative4.4%
Written reviews201 reviews
Positive35.8%
Neutral17.4%
Negative46.8%

Bugs and requests

Epi Tools

Not enough reviews yet to summarise bugs or requests.

Cogni

Reported bugs

2 issues
  • App no longer available after paying for annual subscription
  • Occasional crashes

Requested features

4 requests
  • Integrate ChatGPT or Claude for automatic card creation
  • Add sub-decks for larger decks that need more review
  • Improve algorithm for hard/again ratings to better target struggling cards
  • Add subsections for decks to study different sections separately

In-app purchases

None

Epi Tools

No in-app purchases

9 purchases

Cogni

Subscriptions7
  • Premium Monthly$4.991 Month
  • Premium Monthly$7.991 Month
  • Premium Monthly$14.991 Month
Show 4 more
  • Premium Annual$19.991 Year
  • Premium Annual$24.991 Year
  • Premium Annual$29.991 Year
  • Premium Annual$49.991 Year
One-time2
  • Lifetime Premium$69.99
  • Premium Lifetime$99.99

Questions

Is Epi Tools free?
Epi Tools is free to download, with no in-app purchases.
Is Cogni free?
Cogni is free to download, with in-app purchases available.
Which has better reviews, Epi Tools or Cogni?
Epi Tools is rated higher. Epi Tools averages 5.0 out of 5 from 1 ratings, while Cogni averages 4.7 from 1.7K ratings.
Do Epi Tools or Cogni have ads?
Neither Epi Tools nor Cogni shows ads.
Which is updated more often, Epi Tools or Cogni?
Epi Tools ships an update every 2 months, and Cogni weekly. Most recently, Epi Tools was updated on November 3, 2026 and Cogni on November 12, 2026.

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