Comparison

FSRS Mobile vs JustFlip

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

Head to head
About

FSRS Mobile

A native flashcard app for iPhone and iPad that allows users to import existing decks and study using a spaced repetition system. It supports offline review with local media and offers tools for card creation, editing, and progress tracking.

Highlights
  • Import .apkg deck packages
  • FSRS spaced repetition study
  • Offline review with local media
  • Rich text card creation and editing
  • Browse and search cards
  • Track study progress and streaks
  • Home Screen widgets and reminders
Features
Read full description

FSRS Mobile is a native flashcard app for iPhone, built for people who already have decks and want a focused way to review them anywhere. Import .apkg deck packages, keep your media available offline, and study with FSRS spaced repetition. No subscription. No required account. Just open your deck and start reviewing. KEY FEATURES - Import .apkg deck packages from Files or the iOS share sheet, together with your study progress - Study with FSRS spaced repetition: tap a card to reveal it, then rate it with a button or a swipe - A clear daily goal for new cards that shows the cards left and how long they take - Review offline with local media, images, audio, HTML, cloze cards, and LaTeX support - Create and edit cards with rich text, tags, images, audio, and cloze helpers - Search both sides of every card, then edit, pause, or delete it - Keep your habit visible with a streak and daily reminders FSRS MOBILE PRO (ONE-TIME PURCHASE) - Listen mode: cards read aloud and rated with your headphones, the lock screen, or your car's controls. Your first session is free - Statistics: retention, streaks, review history, and upcoming workload - Home Screen widgets with your due cards and streak - Automatic backup of your collection and media to your own iCloud Importing, studying, creating, and editing cards stay free. FSRS Mobile is designed for language learners, medical students, certification prep, and anyone who studies from large flashcard decks on iOS. PRIVACY Anonymous product analytics and optional in-app feedback help improve FSRS Mobile. No account, advertising, session replay, or personal identifiers are used. Your decks and review history stay on your device and, if you use backup, in your own iCloud.

About

JustFlip

Features
Read full description

Flashcards with a real spaced-repetition engine — and no ads, no sign-up, and no paywall creep. Native on iPhone, iPad, Mac and Apple Watch. iCloud sync included free. Full Anki and CSV import and export, so your cards stay yours. SCHEDULING YOU CAN SEE • Proven SM-2 scheduling, with FSRS available as an optional smart schedule — fewer reviews at the same retention. • Every grade button shows the interval it will produce before you choose it. • Review priority per interest and per deck, so limited study time goes where it matters. • Postpone a card, deck or interest without lying to the algorithm. Holds are stored separately and never touch your memory data. • Leech detection suggests retiring cards you keep failing. CARDS FOR ANY SUBJECT • Cloze deletion (fill in the blank), using Anki-compatible syntax. • Typed answers, with an automatic correct / close / incorrect verdict. • Markdown, LaTeX maths, syntax-highlighted code and tables. • Images with descriptions, read out by VoiceOver. • Tags that cut across decks, plus search over every card you own. BRING YOUR OWN AI JustFlip writes the prompt for whichever chat AI you already use, then imports the answer straight back as cards. No daily caps, no extra subscription, and you review every card before it enters a deck. BUILT FOR APPLE PLATFORMS • Home-screen widget with your due count. • Siri and Shortcuts: ask how many cards are due, or start a review. • Spotlight finds your cards from the Home Screen, matched on either side. • Apple Watch review on your wrist. • Cards read aloud, with per-card language and pronunciation control. YOUR DATA, VISIBLE AND PORTABLE • Works fully offline. No JustFlip account, ever. • iCloud sync shows its last successful sync, with a troubleshooting screen when something looks wrong. • One-file backup, and statistics export as CSV or JSON. ACCESSIBILITY VoiceOver labels throughout, Reduced Motion support, and non-colour indicators when Differentiate Without Color is turned on. FREE AND PRO Free covers up to 3 interests with 5 decks each, with the full scheduler and no ads. JustFlip Pro lifts those limits and adds listening and advanced statistics, as a monthly or yearly subscription or a one-time lifetime purchase. A one-time 7-day trial unlocks the Pro features so you can try them first. This app uses Apple's Standard End User License Agreement (EULA): https://www.apple.com/legal/internal/itunes/appstore/dev/stdeula/ Privacy policy: https://just-flip.app/privacy.html Terms of use: https://just-flip.app/terms.html

Screenshots

FSRS Mobile4 screens
JustFlip4 screens

Verdict

The call

The clearest difference is update cadence: JustFlip at every 5 days against FSRS Mobile's fortnightly. JustFlip also leads on device support (4 vs 1). On price, ads, in-app purchases 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. FSRS Mobile sells 1 one-off in-app purchase and JustFlip sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FSRS Mobile ships an update fortnightly, JustFlip every 5 days. Both last shipped on October 14, 2026.

Scorecard2 real differences · 8 level
FSRS Mobile versus JustFlip: the parameters behind the verdict, then further details
ParameterFSRS MobileJustFlip
PriceFreeFree
Rating3.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, Mac, Apple Watch — better
Requires iOS16.0 — better17.0
Further details — not scored
Size15 MB145 MB
Age rating4+4+
DeveloperTimothy KrechelDANIEL CECH

In-app purchases

1 purchases

FSRS Mobile

One-time1
  • FSRS Mobile Pro$6.99
3 purchases

JustFlip

Subscriptions2
  • JustFlip Pro Monthly$1.991 Month
  • JustFlip Pro Yearly$5.991 Year
One-time1
  • JustFlip Pro Lifetime$12.99

Questions

Is FSRS Mobile free?
FSRS Mobile is free to download, with in-app purchases available.
Is JustFlip free?
JustFlip is free to download, with in-app purchases available.
Do FSRS Mobile or JustFlip have ads?
Neither FSRS Mobile nor JustFlip shows ads.
Which is updated more often, FSRS Mobile or JustFlip?
FSRS Mobile ships an update fortnightly, and JustFlip every 5 days. Most recently, FSRS Mobile was updated on October 14, 2026 and JustFlip on October 14, 2026.

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