Sound quality is bad
The sound quality is bad and the interface is buggy. Once you play a phrase, you can't replay it straight away. I had to close the phrase, then reopen it to play it. Unfortunately, I wouldn't recommend it.
Bad
Has some errors

Learn essential Vietnamese phrases for travel or study with this easy-to-use talking phrasebook. Access dozens of useful words and phrases offline, categorized for convenience. Impress locals with clear audio from a native speaker.
3.0
February 11, 2019
- Improved audio playback - UI improvements
No, Speak Vietnamese Phrases Lite does not contain advertisements. It is completely ad-free, allowing for an uninterrupted learning experience.
Speak Vietnamese Phrases Lite has a rating of 1.5 stars based on 2 user ratings. This indicates a mixed reception from its current user base.
Yes, Speak Vietnamese Phrases Lite does not require an internet connection. You can use it anywhere you go, making it ideal for travel.
Speak Vietnamese Phrases Lite includes phrases in categories such as Greetings, Basics, Shopping, Restaurant, Health, Numbers, and Fun Phrases.
Speak Vietnamese Phrases Lite is compatible with iPhone, iPad, and iPod devices.
The latest version of Speak Vietnamese Phrases Lite is 3.0, which was last updated on February 11, 2019. This suggests infrequent updates.
Speak Vietnamese Phrases Lite has an age rating of 4+, making it suitable for a wide range of users.
The provided information indicates that Speak Vietnamese Phrases Lite is a free version and does not mention any paid upgrades or in-app purchases.