Hi there and welcome!
First: avoid "booster" and "cleaner" apps like the plague. The plague with Covid and bad breath. Those things rarely do any good, and can generally make things worse. There should be no need for any signal boosting in a mobile home (I'm assuming it's your own internet router).
Depending on what router you have, and where it's located, it's quite possible that there are dead spots caused by walls, appliances, or other obstructions (especially metal ones) between the router and your phone.
You may want to reposition your router - if that's not possible, adjust the router's antennae to help improve coverage. If you can't do that, a cheap Wi-Fi repeater may help. These plug into an outlet, receive your Wi-Fi signal and re-broadcast it. A mobile home isn't like a huge house where a multi-node mesh network might help... let us know how these suggestions work out for you.
Also: make super-sure you have a really good Wi-Fi password! In fact, if it's just you and no one else, you may want to hide the SSID completely to ensure no one else is using your bandwidth. There's an app called
Wifi Analyzer - I've used it for years to find out what channels are best suited to my location; and if any dead zones exist. You might want to give it a try to see what you're up against: the fix may be as simple as switching to a clearer channel.
