How do you properly tune A guitar?
Can A guitar be tuned perfectly?
How do you know if your acoustic guitar is tuned?
Do guitars naturally go out of tune?
Do cheap guitars go out tune?
Low-quality strings are not manufactured to give you the best guitar playing experience. It is not unusual for cheap guitar strings to be damaged right out of the box. Cheap strings will not stay in tune for very long, and this could be precisely why your guitar stays out of tune.