There are some app you may have never heard or used, But List below might be useful to you.
Starting in alphabetical order
1. Adobe Scan: Free document scanning app from Adobe, with integrated OCR technology to instantly recognize
text. It is very easy to use and allow to save document in pdf format.
2. Compass: So many compass app available on play store but Compass from “R. Apps” is free and Ad free.
3. DU Recorder: DU Recorder provides an easy way to record screen videos, like game videos, video calls, live shows, and more and its free.
4. DWG FastView: It is AutoCad alternative to View and edit CAD files(like machine drawing, Building Structure), No need of login to view files.
5. Electrodroid: I strongly recommend this app to all Electronics, electrical people. It has all the necessary tools like resistor color code, IC pin-outs, connectors pin-out and many more. Free version contains ad at the bottom but tolerable.
6. Firefox Focus: Firefox Focus automatically blocks a wide range of online trackers from the moment you launch it to the second you leave it. Easily erase your history, passwords and cookies.
7. GST Rate finder: Now days GST rate becomes very complicated and this is the solution…
8. Kalninrnay: Best Calendar app for Indian, with four language options Marathi, Hindi, Gujarati and English.
9. Measure: App from google uses Augmented reality to Measure the length and height of objects on flat surfaces using mobile camera.
10. PicsArt: #1 photo editor and pic collage maker on mobile no need more info…
11. Poweramp: Best Music player app, with great audio tuning features. This is paid app but worth buying for ₹99.
12. Psychrometric: It is useful in Air conditioner industry to find Dry-bulb temperature, wet-bulb temperature, or relative humidity.
13. Rewards: Answer quick surveys and earn Google Play credit, an app created by the Google Surveys team. Use this credit to buy apps like Poweramp.
14. Tasks: Manage, capture, and edit your tasks from anywhere, at anytime, with to-dos that sync across all your devices. Integrations with Gmail and Google Calendar.
15. Translate: Instant camera translation, Use your camera to translate text instantly in 38 languages and 103 languages by typing.
16. TubeMate: This is best app for downloading YouTube Videos, Not available on play store for obvious reason.
17. Unified Remote: Remote control app for your computer. Turns your device into a WiFi or Bluetooth universal remote control for Windows PC, Mac and Linux So many features are there like use your mobile screen as mouse track pad, keyboard. Operate power functions like shutdown, restart, sleep.