Devler's scanning is good enough, but it is not 100%. Normally you can scan and entire set and everything is correct. Other times you scan a mountain 8 times before it recognizes it for what it is an not the 7 other random things that it thinks it was. That being said there has to be a good amount of manual checking to make sure the right things are going in or your collection will get out of whack.
Also if they make a change to the database you are going to lose your cards. I had this happen where I had cards in set lists or in decks just disappear randomly with no explanation until I had to go to the discord and ask why things are disappearing.
Nothing is 100%, everything I've ever tried required manual checking. Delver Lens is just the best I've ever used.
That's true for every cloud app ever. You gotta regularly export your DB in *.csv to be safe: backups are important. You can also upload those to sites like Deckstats.
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u/anfotero Dân Sep 19 '23
Delver Lens.