You will only recover the password if it is weak (common word, short length, or default pattern).
Since ZArchiver cannot crack passwords, you will need third-party "unlocker" or "recovery" tools, which typically use or Dictionary Attacks to try thousands of combinations: Download ZArchiver Donate Apk v1.0.10 For Android (Latest) zarchiver zip password unlocker
Modern ZIP encryption (especially AES-256) is mathematically designed to be resistant to anything but "brute-force" attacks. A simple mobile app typically lacks the processing power to crack a strong password in a reasonable timeframe. Legitimate Ways to Handle Forgotten Passwords You will only recover the password if it
If you have forgotten a password, the following methods are common alternatives to "unlocker" apps: Legitimate Ways to Handle Forgotten Passwords If you
– Recover lost passwords for ZIP files. For legal use on your own archives only.
: It can handle complex, split archives that require a password for the first volume. What to Do if You Forget Your Password