The most popular are **MangaDex**, **MangaSee** and **Mangakakalot**, these are large sites which host content from scanlators. Description of some popular sources are listed below:
- Fastest manga updates: **Mangadex** and scanlator sources
- Largest manga library: **Mangakakalot** (found in **Mangabox** extension)
- High quality scans and official translation: **Mangasee**
Most of the scanlator sources are part of **Multi-source** extensions, which contain multiple sources. For example, extensions like **Genkan**, **Madara**, **FoolSlide** and **ComiCake** which contain sources which host directly from the scanlators' own websites.
In some cases your phone might have some issues downloading the extensions, in those cases you can try installing them yourselves directly from the source.
To install just download the file for the extension you want and then install it, like how you installed **Tachiyomi**.
When installing your first extension and are prompted that your phone isn't allowed to install unknown apps from that source, simply follow the prompt to allow it.
If you need more help regarding this, read [this](https://www.theandroidsoul.com/how-to-allow-apps-installation-from-unknown-sources-on-android-9-pie/)
Extensions for **Tachiyomi** are technically installed the same as normal apps. Either you uninstall them through the app section on your phones settings or you go can do it in the app.
To uninstall an extension from within **Tachiyomi**, go to **<MaterialIconicon-name="extension"/> Extensions** then tap **Uninstall** on the extension you want to remove.
- **Tachiyomi** no longer have pre-installed extensions, this means that you will need to install extensions you want to use from the **<MaterialIconicon-name="extension"/> Extensions** menu.
- If you're getting the `Loader not implemented` error after clicking on a manga, you will need to reinstall the extensions you used to use. Which number in the menu corresponds to which is below.
If you've freshly reinstalled the **Tachiyomi** app, the installed extensions might not show up in **<MaterialIconicon-name="explore"/> Catalogues** until you enable them.
To fix this, go to **<MaterialIconicon-name="explore"/> Catalogues**→**[<MaterialIconicon-name="settings"/> Sources](/help/guides/catalogues/#sources)**. Now you can proceed to enabling your desired sources.
- Download the extension for that source from **<MaterialIconicon-name="extension"/> Extensions** if it exists, read [this](/help/faq/extensions/#which-sources-are-there-in-the-multi-source-extensions) for a list of which extensions contains what sources.
- Go to **<MaterialIconicon-name="explore"/> Catalogues** → **[Browse](/help/guides/catalogues/#browse)** on a source then search for the manga again.
It means that the respective extension for the manga is not installed. To fix, install the extension for the manga. If it still doesn't work, uninstall then reinstall the extension again.
If you're not getting any results when searching MangaDex then you need to log in. To do so enter the **WebView** for **MangaDex** then press the **Manga** drop-down and choose either **Sign up** or **Log in** to proceed with the log in.
To enter the **WebView** go to **<MaterialIconicon-name="explore"/> Catalogues** → **[Browse](/help/guides/catalogues/#browse)**/**[Latest](/help/guides/catalogues/#latest)** next to **MangaDex**, open any manga from the list and then press the **<MaterialIconicon-name="more_vert"/> Overflow menu** in the top-right corner and then press **Open in web view**.
**MangaDex** allows you to search using the ID number to find manga. The easiest way to get the ID is opening the manga in your browser and looking at the URL.
- There is no native way to automatically import your favorites from MangaRock, but you can try [waicool20/mr2tachiyomi](https://github.com/waicool20/mr2tachiyomi).
- Popular alternatives are **MangaDex**, **MangaSee** and **Mangakakalot**.
There is a tool to migrate from **MangaRock** to **Tachiyomi** courtesy of a member of our [Discord server](https://discord.gg/tachiyomi) by the same name as the creator, but a computer is required to finish the migration successfully.
It's not currently possible to restore backup from MangaRock officially, as the MangaRock source is dead. There is however an unofficial method to restore/backup all manga from the MangaRock source.
Chapter cache can be cleared by going to **[<MaterialIcon icon-name="settings"/> Settings](/help/guides/settings)** → **[<MaterialIcon icon-name="code"/> Advanced](/help/guides/advanced)** then pressing [Clear chapter cache](/help/guides/advanced/#clear-chapter-cache).
::: aside
Read more about clearing chapter cache [here](/help/guides/advanced/#clear-chapter-cache)
If you get this error then you need to solve the **CAPTCHA** on their website using your browser (*Google Chrome*, *Samsung Browser*, *Firefox*, *Opera*, etc.).