Wordstack

What it does

• Make folders and word cards. Looking up a word fills in its part of speech, pronunciation, English definitions, example sentences and Korean meanings.
• Study by tapping a card to flip it and swiping to the next one. Mark hard words with ★ or ▲, and set aside the ones you have memorized.
• Each card records when it was created and every time you actually looked at its back, so you can review the words you haven't seen in a while.
• Listen mode reads words, meanings and example sentences aloud.
• Works offline. Your cards live on your device.

Your data

Wordstack has no server and no account of its own. Cards are stored on your device. If you choose to connect a Google account, Wordstack saves a sync file in a hidden folder of your own Google Drive that only Wordstack can use, so your phone and computer show the same cards. It cannot see your other Drive files. Details are in the privacy policy.

Sources

English definitions, examples and pronunciation come from the Merriam-Webster Dictionary API (with your own free key). Korean meanings come from Wiktionary, available under CC BY-SA 4.0.