I've voluntarily developed & published the fastest, smallest (in APK size) Bangla Quran App under the alquranbd.com project. It was the first & only app that had a Full Offline Bangla Quran Searching feature. The app was developed twice, both major versions were developed by me. The version 1 (Hybrid): Version 1 was developed using Web Technologies, such as Ionic, and Angular.js to bundle and ship as an APK. But after releasing version 1 I found it was slow, especially for low-end devices, at that I was using an Android Phone which had only 512MB RAM, to be exact it was: Symphony Xplorer W35. So, I wasn't satisfied with version 1, So I decided to use the knowledge that I had learned from my mentor Zulkarnine Mahmud (zulkarnine.com) in 2014-2015. The version 2 (Native Java, later Kotlin): Version 2 was a success, it was high performant even with Full-Text Search Feature, and Text Matching Highlighting Feature when searching. And the exciting part was that It was only under 2.5MB! The Project's Founder Niamul Hasan was very impressed by the work, as he says very frequently that I've completed the Native Android App in only 1 month! and not only that It was my first production-ready Android Application.