The 1.5.4 version of book'n'keep for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software lies within Business Tools, more precisely Finances. This Mac app is a product of teischl.com. The size of the latest downloadable installation package is 3.8 MB.
From the developer:
Book’n’keep is made to fit the needs of sole traders or small companies that do not have strict bookkeeping rules like double entry accounting but still need to take care what goes in and out. Use book’n’keep instead of creating difficult files and massive paper work.
You may want to check out more Mac applications, such as Boursicoteur, Flowing Pennies or Trade Strategist, which might be related to book'n'keep.