Cardetta support

They are, and that's expected. Anki schedules with SM-2, which tracks an ease factor and an interval; FSRS tracks stability and difficulty. There is no honest conversion between the two, so rather than invent one Cardetta starts imported cards fresh. Your text arrives, and so do the pictures and audio the package holds; the scheduling history is left behind. A deck exported from Cardetta and re-imported keeps everything, history included.

Text-to-speech fields are silent; a hint appears inline as “(hint: …)” rather than behind a tap; a type-in-the-answer field shows as a placeholder; LaTeX or MathJax comes through as its source text rather than rendered; and Japanese readings sit in brackets after the word. Styling is simpler too: bold, italics, underlining and strikethrough show, but colours, font sizes, superscript, subscript and table layouts don't, and pictures and audio sit under the text. A cloze note's text arrives as plain text. A picture linked from the web is left out, since Cardetta fetches nothing; a video comes across as a sound clip; and a character written as a named HTML code that Cardetta doesn't know shows as the code. The original is kept on the card and goes back out in an .apkg export of any side you haven't edited, except a cloze note's text, which goes out as plain text. Nested cloze deletions are supported.

As in Anki, the cards made from one cloze text are a family. Edit the text on any of them and every card in the family changes; add a new number and a card is added, take one out and its card goes, and the editor tells you which before you save. Hold the cloze button to put a gap on the same card as an existing number: the highest so far, or from version 1.1 any number in the text. An Anki cloze note’s Back Extra comes across and shows under the answer.

Cardetta reads packages from every recent Anki version, including the compressed newer format. If one is refused, the app says why rather than failing silently. Very large packages, well over a gigabyte, are the least tested path, and one holding a single file over a gigabyte is refused; before version 1.1, the app wrongly said it was not an Anki package. Write to us with its size and where it came from, and we'll look.

It is. Cardetta writes the older, widely compatible package format and stores its contents uncompressed, which trades file size for the near-certainty that anything since Anki 2.1 will open it. On a very large deck, expect the export to take a moment.

A CSV is plain text and cannot carry either — it is there for spreadsheets. Use .apkg for anything you intend to bring back, which keeps formatting, media and, between Cardetta and itself, review history.

Ask the app. The ⓘ button during a review opens Why this card, today, which explains the decision in plain English and then shows the numbers behind it: stability, difficulty, the chance you still remember it, your last rating, the current interval, and how many times you've seen and forgotten it. No app should ask you to trust a queue it won't explain.

Cardetta is free for one deck and fifty cards, with everything else the app does. Cardetta Unlimited removes both limits: £2.99 a month or £19.99 a year in the UK, and each plan starts with a free week for new subscribers. It renews automatically until you cancel, which you can do any time in Settings › Apple Account › Subscriptions; cancel at least a day before the period ends to avoid the next charge. If you stop, nothing is deleted or hidden, and you can keep studying every card. Each number in a cloze text is its own card, so gaps numbered 1, 2 and 3 count as three cards, and gaps sharing a number count as one. The subscription screen appears when you go past the free limits or choose Get Cardetta Unlimited in Settings, never during onboarding.

No. A subscription belongs to your Apple Account rather than the phone, so it covers every iPhone signed in to that account, and Restore purchases in Settings brings it back if it does not show straight away. Your decks, though, are a separate matter — see the next answer. Apple takes the payment and handles refunds, at reportaproblem.apple.com.

Yes, through your own iCloud. Sign in to the same Apple Account on both iPhones and your decks, cards, deck settings and review history follow you; Settings › iCloud in the app tells you whether this copy is syncing. Two things to know: images and audio are files rather than records, so they don't sync and another iPhone shows the card without them; and the sync goes through your private iCloud database, which Apple holds and Mirentha cannot see. If you would rather not use iCloud, export the deck as .apkg and import it on the other device — between Cardetta and itself that round trip keeps every card's history and creates no duplicates.

Then you're already on track, and Deck settings will say so. Exam mode can only bring work forward: it raises the daily new-card allowance so you meet every card before the date, and pulls back reviews FSRS had scheduled after it. If every new card already fits in the time you have and no review falls after the exam, there is nothing to bring forward.

It's the chance FSRS aims for that you still remember a card when it comes up. Higher means more frequent reviews and more work per day; lower means fewer reviews and more forgetting. 90% is the usual balance and a good place to leave it unless you have a specific reason.

Not yet. Cardetta uses FSRS with its default parameters, which are drawn from a very large body of review data and are a sound starting point for anyone. Fitting parameters to one person needs a long review history to be better rather than just different, so per-user optimisation is deliberately out of this version.

Nothing reaches Mirentha: there is no server of ours and no analytics. What you type is stored on your iPhone and, when you are signed in to iCloud, mirrored through your own private iCloud database so it can reach your other iPhone. Importing, studying, editing and exporting all work in aeroplane mode; sync simply catches up when a connection returns. Subscribing to Cardetta Unlimited is handled by the App Store, outside Cardetta, and carries nothing about your decks. Full detail is on the privacy page.

Recording needs microphone permission — check Settings › Apps › Cardetta › Microphone. If you switch between Basic and Cloze, or a call comes in, while you are recording, the take stops and is kept on the side you started it on.

An iPhone running iOS 26 or later. Cardetta is iPhone-only and portrait-only; there is no iPad, Mac or Apple Watch version.

Delete the app, and everything Cardetta held on that iPhone goes with it: decks, cards, images, audio and review history. If iCloud sync was on, your decks, cards and review history are also in your own private iCloud; to remove those as well, go to Settings › Apple Account › iCloud › Manage Account Storage (Manage Storage on some versions of iOS), choose Cardetta and delete its data. Deleting a deck in Deck settings removes it from iCloud and your other iPhones too. Export anything you want to keep first. We hold nothing, so there is nothing to ask us for. Deleting the app does not cancel Cardetta Unlimited; do that in Settings › Apple Account › Subscriptions.