| ELECTRONS | 1 · max 72 |
| SUBSHELLS | 6s¹ |
| CUMULATIVE | 55 of 55 |
| IONISATION | 3.89 eV |
Invoices, reports and tax estimates are all worked out from the same entries, so they agree with each other.
One plan and one price. No paid tiers and no add-ons.
Export all of your data whenever you like, and take it with you if you leave.
Type a time, a date or an amount straight into the field. Enter saves and Escape cancels.
Most freelance spreadsheets fall behind the work.
Cesium keeps up because its numbers come from the work you log.
Ataru is a small software studio that builds calm, durable tools for independent operators. Cesium is its first product. The studio also takes on a short list of contract engagements each year, with a focus on clean architecture, well-tested code, and software that ages well.
The work follows the Clean Code and software craftsmanship tradition: small, readable, well-named units, tests that document behavior, and an unhurried pace.
What ships next is public. The roadmap lists what we are building now, what is queued, and what has landed - and signed-in operators vote on it and suggest what comes next.
» view the roadmap