Trailium

Trailium is built for devices that meet the minimum system requirement stated in this listing, or run something newer. If your phone is on an older release, it may refuse the install until the device is updated. Check your current system version against the stated requirement before starting the installation so you are not left with an app that will not open.

The installer itself is 54.0 MB. That figure covers the download package only, so budget some additional space for the unpacked application and any images or working files it creates while in use. Devices already close to their storage limit should free up room first, as a nearly full device can cause an install to fail partway through.

The latest build listed here is 1.2.21, dated 2026-10-01. This is the version referenced throughout the listing, so use it when comparing against other builds you may already have installed. If you are tracking updates across several devices, matching this exact version string is the simplest way to confirm that every device is running the same code.

The package identifier for Trailium is com.observin.proto. This is the permanent string the system uses to recognise the application, independent of how the app is displayed on your device. It is useful when you want to confirm exactly which app is installed, locate its files, or distinguish it from similarly named software.

No content rating has been supplied with this listing, so no age guidance accompanies the current entry. Anyone assessing the app for younger users should treat the rating field as unavailable rather than assuming any particular classification, and rely on the developer name, Observin, and the photography category when making a judgement.