Apps Like Blue Box for iPhone and iPad
Encode and decode DTMF touch tones.
The app encodes and decodes DTMF signals. Users can generate tones using a keypad or decipher tones via the microphone.
by Sunshine Valley Systems★ 5.03 ratingsUtilities$4.99Data updated 2026-09-16
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How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.