Honest reaction to your two boards, then a refined direction that combines the strongest ideas. The system has three parts: an icon mark (for app icons), a wordmark (for headers/marketing), and a monogram (for tight spaces).
All four are weaker than image 1 — these are compositions, not marks. The elements don't feel inevitable together.
A solid disc placed in the lower-left of the canvas — sitting on the baseline like a literal period. The "+" is implied by the icon's role in the system, not drawn.
Your strongest idea, refined. Inter Black, tight tracking, with the leading dot as a separate disc — not a typed period. The dot ties back to the icon.
When you need a letterform — favicon, Apple Watch complication, in-app brand chip. Lowercase d with a small + as superscript, plus a dot detail near the ascender (carries the geometry from the icon).
The logo uses pure values; the UI does not. On OLED, the icon disc at mono.900 reads as washed-out grey next to apps using true black. We now reserve two dedicated mark tokens — #000000 and #FFFFFF — for the logo only. UI surfaces stay at mono.900 / mono.50 for eye comfort across large fields.
Rule: the logo is built from two pure values — #000000 (Mark Ink) and #FFFFFF (Mark Paper). Accent colors (info, positive) are only used as the disc in mono+1 variants on a Paper canvas, and only in marketing or hero contexts — never in the product chrome.
state.info blue or state.positive green for monochrome+1 versions. Tell me which.