To add to the above: You might have used the app mentioned in Two versons of Anki? Orange and Blue? (AnkiApp) - #2 by PilgrimLyieu. Is that the same logo? If yes, then you used an anki knockoff app.
To add to the above: You might have used the app mentioned in Two versons of Anki? Orange and Blue? (AnkiApp) - #2 by PilgrimLyieu. Is that the same logo? If yes, then you used an anki knockoff app.