Do you have an Android version? No. Outside Maps only runs on iOS and macOS platforms. There are no plans to do an Android version.
Why don't you include Ordnance Survey Northern Ireland mapping? Ordnance Survey Northern Ireland is a different agency to the Ordnance Survey and don't provide online mapping. As such, we can't offer that.
Can I download maps for offline use? No. The Ordnance Survey licence does not allow for this without paying a licensing fee.
Do you offer 1:25000 (Explorer) mapping? We currently don't offer this mapping as it is not available under OS OpenSpace. However, it does appear to be available under OpenSpace's successor which Outside Maps will migrate to in early 2021.