localStorage quota is 5MB (per domain IIRC), PouchDB uses IndexedDB or WebSQL internally, which gives you a lot more quota to work with, and I believe each DB h

localStorage quota is 5MB (per domain IIRC), PouchDB uses IndexedDB or WebSQL internally, which gives you a lot more quota to work with, and I believe each DB has it's own quota. localStorage is not indexed, you have to implement some sort of lookup yourself. If you go that way, a tip is to store values as objects with ids as keys, that way you get a sort of hash map as index thing going which alleviates things a bit. PouchDB is indexed and provides a way to query your documents.