1. Getting started
To run Android applications on your Jolla device, you need to download Android™ Support from the Jolla Store. You probably have installed it when you first started up your device, but in case you haven't, please see below:
  • Tap on the Jolla Store icon in the App Grid
  • Select "Search" from the pulley menu above, and search for Android Support. Once on Android™ Support application page, select "Install" from the pulley menu above.
  • Once Android™ Support is installed, search for Aptoide Store and install it.
You can now find Aptoide Store at the end of your installed applications in the App Grid.

2. Downloading applications from Aptoide Store
Launching the Aptoide Store application will take you to Aptoide's front page. Here you will find the most popular applications, as well as new interesting applications added to Aptoide.
Below is the screenshot showing the front page view on a Jolla phone:
Swiping left will reveal all the tabs in Aptoide Store: “Home”, “Top”, “Categories”, “Updates”, and “Download manager”.

2.1. Using search
Search for your favorite app by tapping on the magnifying glass icon in the top-right corner of any view within Aptoide Store:
Aptoide Market
Aptoide Market
Aptoide Market
Can't find the apps you are looking for?
Aptoide also offers a method of extending your search beyond the Stores added to your Aptoide Store client. Read more about the "Search Other Stores" feature in this support article.

2.2.1. Installing a specific version of an application
You can also download different versions of applications from Aptoide Store. Should you choose to download an older version of the application currently on your device, Aptoide will first uninstall the application in question, and then download the requested version on to your device. No application data is lost in this process.
Below is a step-by-step instruction on downgrading an example application. The steps are carried out on a Jolla C device:
1) Browse to the page of the application in question:
Aptoide Market
2) Tap on the "Related" tab, and see the versions listed under the "Multiversion" heading:
Aptoide Market
3) Select the version you are interested in (for more options you can press the +More button). This will take you to the download page of said application version. Then confirm by pressing "Downgrade":
Aptoide Market

2.2. Installing applications
Tapping on a search result will produce the application page of the selected application.
Before tapping 'Install' check that the publisher is correct. Otherwise you might get an application which is not authentic. In the worst case it can be some kind of exploitation attempt.
Aptoide Market

2.3. Uninstalling applications
You can also uninstall applications by using Aptoide Store. It is always possible to uninstall applications via the Application Grid; but uninstalling this way ensures that Aptoide is able to keep up to date with which applications you have installed.

You can uninstall an application by going to the “Updates” page, which shows all Android applications installed on your device:
Aptoide Market
Tap on any application to go to its page. Then, tap on the three dots located on the upper right corner of the application page, where you can select the "Uninstall" option from the menu. Select OK from the pop-up query to confirm:
Aptoide Market
Aptoide Market

2.4. Updating applications
Aptoide Store notifies you when there are updates available to your applications. To download the udpates, go to the "Updates" tab from the main page, and tap "Update all":
Aptoide Market
If you swipe down in this page, Aptoide Store will refresh the availability of updates.
To see the progress of your application updates, go to the tab "Download manager":
Aptoide Market

3. Stores within Aptoide Store
As mentioned before, Aptoide Store is in fact a collection of several application stores. Anyone is free to start their own application store, and publish them on Aptoide Store. You can then “subscribe” to these stores to broaden your search results. Please note that this feature is available only in the tablet version of Aptoide Store.
To see which stores you are subscribed to, return to the main view of Aptoide Store and go to the "Stores" tab:
Aptoide Market

3.1. Subscribing to stores
By default you should be subscribed to the “Jolla Tablet Store” app store. For most users, being subscribed to this application store is enough. However, should you ever want to add another store to Aptoide Store, please follow the instructions below:
1. In the "Stores" tab, tap on "+ Subscribe Store" button.
2. You will see the pop-up box requesting the name of the store:
Aptoide Market
3. Type in the store name you want to add, or to browse popular stores tap on “See Top Stores”. This will open up a browser to show the results:
Aptoide Market
4. After finding a store you wish to add, return to Aptoide Store to enter the name of the store.
Aptoide Market
Aptoide Market

Once you have subscribed to a store in Aptoide Store, you will receive notifications for any updates to applications present in these stores.
Link Download Aptoide for Android: here