Auth0 Token Vault handles secure token storage, exchange, and refresh for external providers so you don't have to build it yourself.
Rolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.
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Fully Managed MySQL, PostgreSQL, and SQL Server
Automatic backups, patching, replication, and failover. Focus on your app, not your database.
Cloud SQL handles your database ops end to end, so you can focus on your app.
...It runs on any browser and supports a great variety of tile layers (Open Street Map and Google Satellite among others).
As a php+mysql service can be installed on any web server (i.e. your bike-team site!).
It's free, open source, portable and cross-platform.
*** NB ***
- Check the "allow unknown sources" option on your device security settings to setup on Android.
gc2oc Link provides a link to a opencaching.de listing from a geocaching.com listing. The user has to install a greasemonkey skript to add the link to the GC listing page.