Work with Ledger team to design new UI according to the expectations. Implement new UI into the Cardano Ledger App. Pass the external audit process (costs for this shall be included in proposal). Support the Ledger team by the release process.

In 2018 when Ledger Cardano App was developed, there was no standard for embedded app UI. Over the years this changed and now Cardano is the only Ledger application with non-standard UI such as requiring double-click several times during the confirmation process. This is causing confusion among users and problems with testing because the design is not compatible with the testing suite.

Ledger wallet users will have better Cardano experience. Further app updates and releases will be faster and cheaper due to Ledger testing suite compatibility.

Ledger wallet users will have better Cardano experience. Further app updates and releases will be faster due to testing suite compatibility. Increased compatibility with new Ledger products

UX/UI design - 20 workdays ($30,000 = 50,000 ADA) Design technical feasibility - 10 workdays ($15,000 = 25,000 ADA) Implementation & testing - 70 workdays ($105,000 = 175,000 ADA) Project management - 10 workdays ($15,000 = 25,000 ADA) External audit - 5 workdays - ($15,000 = 25,000 ADA)

TOTAL - $180,000 = 300,000 ADA

0.7 FTE for 10 months

Vacuumlabs was solely developing Cardano integrations for Trezor and Ledger since 2018.

There is another proposal for maintenance of Cardano HW wallets.

This was included in TSC projects shortlist https://committees.docs.intersectmbo.org/intersect-technical-steering-committee/technical-roadmap/potential-roadmap-projects#ledger-app-rewrite

There is a request from Ledger to do this work, they even prepared a high level document outlining the scope of work https://docs.google.com/document/d/1AKwX7xoKL0w4ZX9rK5On1px1kGqC6FOabrlSV2SfrrA/edit?tab=t.0#heading=h.v3zp7ejibdgb

Collaboration with Ledger team (this was already approved by them ~1 year ago)