This 6-year old e-signature app reports $605K in annual profit at a 77.3% margin, supported by top App Store keyword rankings across multiple countries.

The numbers: The asking price is $3.01M on $782.7K in annual revenue and $605.4K in annual profit, equal to approximately 3.8x revenue and 5.0x profit.

How it works: The iOS app turns photographed handwritten signatures into clean digital signatures that users can add to PDFs and other documents. It gets customers through App Store search, Google Ads, and Apple Search Ads. A recently launched Android app is included, while a web version has not yet been built.

The seller situation: The seller says the ad campaigns have seen little testing in recent years. The listing also does not explain whether revenue comes from subscriptions, one-time purchases, or in-app purchases.

Worth asking: What percentage of revenue is recurring, and what do retention, churn, and CAC look like by acquisition channel and country?