Intervalometer is an automation app for time-lapse to trigger camera shutter in any camera apps with a user-configured time interval. 
Normal time-lapse mode in most smartphones only allows auto exposure without additional controls on exposure settings and RAW format. 
Intervalometer works with any camera modes in any camera apps including light-painting mode, HDR, night mode, manual mode, telephoto or ultra-wide angle mode to capture a series of time-lapse image frames. 
This app works like an actual intervalometer for smartphones, it automates camera shutter triggering using AccessibilityService API and it works on any camera app for Android 7 and above. 
It can also be used with dedicated camera's remote apps from Canon, Sony, Nikon and etc to trigger the shutter button in the camera's remote app, this acts as an actual intervalometer for dedicated cameras too.
With intervalometer and its flexibility to control time-lapse configurations, the following types of time-lapse are possible.
1. Low light time-lapse 
2. Long exposure time-lapse
3. HDR time-lapse
4. Milky Way time-lapse / Star Trails time-lapse
5. Holy Grail of time-lapse (Day to night time-lapse)
6. Ultra wide angle time-lapse
7. Light painting time-lapse

Other than time-lapse, it can also be used to capture frames for image stacking in post-process (on other apps) to achieve higher quality images and etc.
1. Image stacking
2. Star trails
3. Lightning stacking

Features
- Full control on time-lapse configuration (delay timer, interval time, number of shots)
- Infinite mode
- Bulb mode
- Works with Any camera app (shutter button position can be reconfigured)

Note: For Huawei and Xiaomi devices, please try to restart your device if it doesn't work or touch input can't be triggered.

Disclaimer: Intervalometer only automates photo taking process, it is neither a camera app nor image processing app.

An interval timer to automate photo taking process for timelapse