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There are two editions: Persian (Farsi) ↔ German and Persian (Farsi) ↔ English, each translating in both directions. Each edition handles one language pair; neither translates between German and English.
Yes. Each edition prepares its language models the first time you open it, then recognises speech, translates and speaks without a connection. Keep the app open until that first preparation has finished.
Android 9 or later on a 64-bit ARM processor. Most testing so far has been on a Galaxy S21 Ultra, so other phones may behave differently. There is no iPhone version.
Keep at least 6 GB free before installing either edition. Each installer is about 1.8 GB and the prepared language models need their own space.
Use it to understand and to be understood in everyday conversation. Important official, legal or medical translations need a qualified human translator to check them before anyone relies on them.
Download it free from this page and choose Persian ↔ German or Persian ↔ English. The app is not in app stores; if Android asks, allow installs from the app you used to open the file.
Yes. Each edition is its own Android app with its own language models and its own package name, so installing one does not replace the other.