Because size matters.


Abaci calculates various sizes of text to be used in print and digital applications (e.g. brochures, websites, emails, reports) that are complementary to each other and based on the famous proportions of the Fibonacci sequence.

Wonder no more what size your heading should be – simply input your body text size and see what is suggested for your heading sizes above that. The golden proportions offered ensure that what you use will then be inherently pleasing to the eye. You can even work backwards by selecting a heading size, to see what size your body should be.

Perfect for new designers and developers, or as a reassuring tool for the experienced, Abaci’s aim is to provide a simple-to-follow starting point for typography in your project.


The Abaci app uses the Fibonacci Sequence to calculate the heading sizes used in print documents or digital applications. The Fibonacci sequence is a series of numbers where a number is found by adding up the two numbers before it. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on.

The Fibonacci sequence is named after Italian mathematician Leonardo of Pisa, – known as Fibonacci – and his sequence has inspired design, music, books, art, architecture and of course, appears throughout nature.


The simple dial based tool allows you to quickly rotate to a desired type size from the base H5 (Body copy) setting. Alternatively you can choose your base as any of the H1-H6 settings as well choosing between pixels and points for your selection. You can even type in a desired number to work from using the digits within the dial. Once you are done add as an image to your camera roll to save or share with your team.


Text is one of the primary ways designers can communicate with users. Typography can make or break a design. This app uses historically pleasing ratios to create a scale to determine type sizes.

As with most things, rules are made to be broken. The Abaci app is used as guide to appropriate sizing in your layouts and designs.


Abaci is an app developed for the creative industries with its primary users being graphic and web designers. The app has been devised to help speed up the time consuming tasks of creating text styles within print and web based applications. It can also be used as a guide for discussions between graphic designers and digital developers to help manage any miscommunications.

Key Features

•  Save time creating your type style sizes
•  Save your styles to your phone for easy access at any time
•  Share your styles easily with colleagues
•  Create, test and refine as many times as you like
•  Choose your base setting to work from
•  Work in pixels or points
•  Enter your point size within the dial
•  Flexible and easy to use
•  Reset quickly if required


Look out for future updates or let us know about features you would like to see.