How to remove zoom function in android app?

Question

Android

Hello fellow developers.
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My story:Perhaps my story will seem banal, but still, I did not find any information on this topic. I decided to try my hand at javascript programming. Vnik, I tried it, it seems to work. At first I wrote in pure javascript, then the relevance to the JQuery libraries appeared, I got lazy, lost my experience, and now it’s hard to program something without jQuery. But this did not end my interest in this language. When the boom in adaptive design began, everything went off the chain, and you had to do whatever you like to make clumsy content work in push-button phones. But time passed, frameworks appeared, one of them today is known as Bootstrap, and life seems to have become easier, thinking with your head and there was no need at all, I made it using bootstrap technology and the site is adaptive. But without thinking long the developers of this framework decided to make it public. Obviously predicted the release of touchscreen phones with a large screen, and now they are very popular! Naturally, such phones, which didn’t even have their own OS, fell sharply in demand, and indeed, there is “symbian”, for some time, this platform was wildly popular and cool, because this phone was almost without buttons, plump, but color and touch! Why am I telling all this, and to the fact that I did not have time to get used to such a platform, as the "Android" and "iOs" platforms came out. Am I really so ancient that I went through all this, or did I just fall into an era where progress was higher. But by the way, realizing that the popularity of applications is growing, and I have knowledge in javascript, I took the liberty of writing my first application. clumsy, terrible, but working. More than once I had to get wet and sweat, faced with increasingly tricky situations. I freaked out, and used a ready-made solution, a template, pushed my functionality there, and calmed down. Until beta testing starts. My test subject and I encountered a lot of inconveniences when we started using the application, and I began to gradually fix them.
Question: I don't know what this nonsense is called. In general, how to remove this garbage ...

Thanks in advance, and also advise on which IDE or which compiler is better to work on, what would you advise a novice android and iOs developer?
Don't be afraid to criticize, I'm not touchy, I'll be interested to hear everything you say))
Thank you in advance for your responsiveness.