One of the best is 3PO, a real-time speech-to-speech translator that works with 45 languages. It's got zero-configuration translation so you can use it in multilingual situations like international conferences or just walking around hotels and restaurants in tourist areas. And it's private, since it doesn't store any data and uses only audio and text for translation.
Another good option is iTranslate, a translation app that covers more than 100 languages. It's got features like voice translation, camera translation and offline use that can be useful for travelers and businesspeople. It's available on multiple platforms, and you can try its PRO version for 7 days to see all the features.
If you want real-time voice and caption translation for more than 100 languages, check out Byrdhouse. It's an AI-powered system for meetings, calls and chats that's got tools like voice-to-text transcription, accent support and meeting transcripts. It's got a variety of pricing tiers so you can pick what's right for you, so it's good for personal and professional use.