Secret Shots
A short, opinionated list of the things worth reading and using outside this app — the ones that actually helped, not every resource that exists.
The QuickSheet
PDF · 315 KB · 2026 edition
Every formula and relationship worth having in front of you, on a handful of pages. This is the 2026 edition and it ships unchanged — the numbering moved for 2027, the mathematics did not.
Read weekly
Once the app has installed, the QuickSheet is stored on this device and opens without a connection. The three links are other people’s websites — they need one, and they are not ours to keep working.
Secret Shots
A short, opinionated list of the things worth reading and using outside this app — the ones that actually helped, not every resource that exists.
The QuickSheet
PDF · 315 KB · 2026 edition
Every formula and relationship worth having in front of you, on a handful of pages. This is the 2026 edition and it ships unchanged — the numbering moved for 2027, the mathematics did not.
Read weekly
Once the app has installed, the QuickSheet is stored on this device and opens without a connection. The three links are other people’s websites — they need one, and they are not ours to keep working.