Unfortunately UNI-T doesn’t have an android app for Uni-t Uti260m Smartphone Thermal Camera on their website and it’s hard to find.
I got this one and it works fine. VirusTotal says it’s ok and basic checking on the phone too. So hopefully it’s clean. 🙂

Here is download link: https://jentak.nejen.cz/wp-content/uploads/2023/01/UTi256M-UTi260-APK.zip