Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Threema offers end-to-end encryption for text, voice, video, and photo messages, and you can share files up to 50MB.
Source: https://www.digitaltrends.com/mobile/best-text-messaging-apps/