The problem Tally Lock solves

TallyLock reduces the risk of election fraud by providing a simple and affordable way to notarize and lock election tally sheets on a public blockchain right when they occur in 3 simple steps.

Registered Notaries are added to the TallyLock Smart Contract as Authorized Notaries
On the day of the election, right after the tally is performed the Notary takes a picture of the tally and uploads it to IPFS and the TallyLock Smart Contract where it's timestamped and protected from tampering so results are not manipulated or changed in the future
At any moment after the tally is performed, citizens can audit and validate the results

This process is currently performed physically, using expensive and insecure scanners or sometimes unreliable and expensive software.

Tally lock can also be used by Notaries to notarize any document on the go without carrying seals or ledgers. Documents can be made public on IPFS or a signed certificate can be produced for private documents.

Challenges we ran into

Took us some time to unrust android + blockchain. We focused on small steps first to get us to a fully functional Proof of Concept.