Short version: Export unencrypted JSON, move the file over, open it.
Steps
- Export
Aegis → Settings → Import & export → Export. Format: JSON. Turn off “Encrypt the vault”. Aegis will warn you; that's expected.
- Move the file
Get it to the iPhone by a route you trust — a USB cable, a self-hosted share, or an end-to-end-encrypted message to yourself. It contains every secret in plain text, so don't email it.
- Import
Vault2FA → + → Import from another app → Choose export file. Favourites and notes come across too.
- Delete the plain file
From both devices and any intermediate location.
Worth knowing
- Encrypted Aegis vaults use scrypt, which iOS doesn't ship. Supporting it is on the list; for now the unencrypted route is the way.
- Yandex and mOTP entries aren't supported; they're counted and reported rather than silently dropped.
Afterwards
Make an encrypted backup (Settings → Backup) before you delete the old app, and check the support page if a code is rejected — it is nearly always the phone's clock.
Stuck? support@vault2fa.app. Never send a secret or a backup file by email.