I too use Keepass2android offline, never had a sync issue though recently I inexplicably encountered an issue where the keyfile couldnt be found or had become corrupted on mobile. This may have been a phone thing rather than a Keypass thing as I never had such issue in many years of use. Luckily I had the forethought to keep an encrypted backup so I was back up & running quickly.
If I remember Keepass allows pdf attachments without restriction which is excellent for vehicle insurance, breakdown cover etc as its good to have these available offline anytime “just in case”. I think this feature is restricted in Bitwarden (though maybe not Vaultwarden).






Ive used OsmAnd+ for years & I still find it confusing to find specific settings! Thankfully OsmAnd settings can be backed up & exported/imported.
That said, several times in new cities in both in my home country & abroad late in the day, it’s found us places to eat, toilets, late night supermarkets etc etc. I was grateful to the mappers & I vowed to do the same in my home city suburb to help any fellow visitors who find themselves here. I kept my word & mapped it extensively though I’ll not reveal where.
Several months ago we visited a European capital for a city break, the public transit navigation in OsmAnd was fantastic. The offline wiki articles are amazing when visiting new places.
Top tip: utilise the “Quick Action” shortcut button. Add fuel, parking, parking location, wiki & “show nearest POI”. You can toggle them on/off in an instant when needed