About the project

Coinli is a mobile app for coin collectors and anyone who has an old coin lying around at home. The user photographs a coin, the app recognizes it and shows a card with a reference price and rarity, and a separate grading service helps figure out what a particular specimen is worth. The app interface is in English and designed for an international audience.

Challenge

Someone who has found a coin usually needs to answer three questions: what is it, how rare is it and how much might it be worth. Reference books and catalogs answer these questions but require you to know what to look for. We needed to design an app where the path from a coin in hand to an answer fits into a single action — taking a photo.

Photo recognition

The main screen is built around a single action. A large coin in the center and the caption “Tap here to recognize a coin” immediately explain what to do, and the “Identify a coin” button starts recognition. For those who know the name, there is search at the top, and below is the entry point to the “Grade Your Coin” grading service marked Beta.

The camera guides you to a good shot: a frame for the coin, a “Move your phone closer” tooltip and a side switch — Obverse and Reverse, because both are needed for accurate identification. You can shoot manually or turn on automatic mode, upload a photo from the gallery and turn on the flash. The “Get a PRO” entry point to the paid version is also here.

Coin card

After recognition, a card opens: photos of the obverse and reverse in a carousel, the name and years of issue, and a reference price range with the condition on the grading scale (for example, AU — About Uncirculated). The “Expert Insights” block shows rarity on a scale from Very Common to Ultra Rare and the coin's mintage. This way, the user understands within seconds whether their find deserves attention.

Specimen grading

A reference price is a range, and the actual value depends on the condition of the specific coin. For this, we designed the “Coin Grading” section: the user submits a coin for grading and sees a list of their requests with number, date and status — “Processing” or “Done”. The bottom navigation includes home, catalog, grading and personal collection, while the camera is placed in the central button so recognition is available from any screen.

Result

Coinli lets you identify a coin from a photo, find out its reference price, rarity and mintage, submit a specimen for grading and keep your finds in your own collection. The interface guides the user from snapshot to answer without the need to master numismatic terminology in advance.