The Aktiia App should update automatically, if the settings for automatic Apps Updates on your phone is switched ON.
Android: You can enable automatic updates for all apps on your Phone following next steps:
Open the Google Play Store app.
In the top right corner, tap the profile icon.
Tap Settings Network Preferences Auto-update apps.
Select an option:
Over any network to update apps using either Wi-Fi or mobile data.
Over Wi-Fi only to update apps only when connected to Wi-Fi.
For more information: https://support.google.com/googleplay/answer/113412?hl=en
iOS - You can enable automatic updates for your apps. Open Settings and enable updates inside the Automatic Downloads menu as follows:
Settings - choose iTunes & App Store - Toggle on Updates under the Automatic Downloads section - TURN ON