You can easily detect a spy software in your phone.
That website (1mole. com) has list 11 spy softwares and how to detect them in your mobile device

The list:
- Omegaxxxx
- Innoxxxx
- Spybubxxxx
- Flexixxxxx
- Copyxxxx
- Mspxxxx
- Vietxxxx
- Helloxxxx
- Mobilesxxxx
- And more ...

So if you have 5 minutes, visit that website and check if you get one in your phone