Ajera mobile timesheets are based on mobile responsive websites, not a dedicated app.

Locally Installed Ajera
https://companyname.com/ajera/m
Ajera runs on servers managed by firm. 

Deltek Cloud
https://login.ajera.com/m
Ajera runs on Deltek servers.

Ajera Mobile Timesheet Tour
https://help.deltek.com/Product/Ajera/USS/ajera_mobile_timesheets_guided_tour.mp4

Ajera Mobile Timesheet Support
https://help.deltek.com/Product/Ajera/Mobile/Resources/

iPhone and iPad - Add website bookmark to home screen
https://www.macrumors.com/how-to/add-a-web-link-to-home-screen-iphone-ipad/

Android - Add website bookmark to home screen
https://www.howtogeek.com/196087/how-to-add-websites-to-the-home-screen-on-any-smartphone-or-tablet/

Ajera support and learning resources are spread across multiple sites. This list points to the primary locations for Ajera information.

Ajera Learning Center is the in app support documentation. This link opens the support site without having to login to Ajera.

Deltek Customer Support Center contains Ajera knowledge base, documentation, and support case management. Password protected.

Widget Gallery - From Ajera, open widget editor, add widget, browse gallery. Must have access to Ajera.

Deltek Learning Zone or Deltek University - Individual training courses can be purchased or a subscription provides access to all training. The training subscription is now include with Ajera cloud renewals.