Lemon Inc. is working with BillGuard, which provides a transaction monitoring service, to boost its mobile wallet's security and perhaps also boost the wallet's appeal among consumers.

Lemon's wallet allows consumers to upload payment and loyalty card data by scanning physical cards with a smartphone's camera. Users can then access their account details as text or a two-dimensional bar code. Typically, two of each Lemon user's cards are payment cards, and BillGuard 's service offers free credit and debit card monitoring for up to three card accounts.

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