AiAtHand

We build simple solutions to specific problems. Three so far: Aether for anyone who writes on a Mac and wants AI within reach, Plutus for anyone weighing a property investment who wants to see the numbers before deciding, and Athena for students facing their state final exams who want what they learn to last.

Write to us at hello@aiathand.com.

Aether

AI on selected text, in any app on your Mac.

Gmail compose window with a Czech sentence: Děkuji za nabídku, do konce týdne pošlu upravenou verzi smlouvy s poznámkami k platebním podmínkám. — Before: a Czech draft in Gmail. Hover or tap to see it after one key press.After one key press: the same draft in English.

The same Gmail compose window after one key press, the sentence now in English: Thank you for the offer. I'll send you the amended version of the contract with comments on the payment terms by the end of the week. — Before: a Czech draft in Gmail. Hover or tap to see it after one key press.After one key press: the same draft in English.

Select text in any app on your Mac, press a hotkey, and the result lands back where the text was. Two presets work today: translate between Czech and English, and fact-check a claim while you write. Aether runs on your own API key for Anthropic, OpenAI or Gemini, on a local model through Ollama, or on the claude, codex or gemini command you already have in your terminal. Nothing leaves your Mac until you ask it to, and nothing you write is ever logged.

Platform: macOS 14 and up
Price: €39 lifetime, or €2.90 a month
State: Beta, available to order

Buy Aether

Plutus

A free real-estate investment calculator.

Plutus tells you whether a residential building pays off before you commit to it. Enter the land, the construction, the apartment mix, rent and financing, and it returns NPV, IRR, payback and a 30-year cashflow. It runs in the browser, in Czech or English, in CZK or EUR, and it costs nothing.

Platform: Web, Czech and English, CZK and EUR
Price: Free
State: Runs at plutus.aiathand.com

Open Plutus

Plutus results step: NPV, IRR, payback and a 30-year cashflow chart — Plutus on the results step, with the 30-year cashflow.

Athena

Flashcards for Czech state final exams, timed to what you are about to forget.

Biomedicínská technika, otázka 1

Jak poznáš, zda je signál deterministický nebo stochastický?

Deterministický lze popsat funkcí a předpovědět, při opakování za stejných podmínek dostanu stejný průběh. Stochastický dává při každém měření jinou realizaci, popsat ho umím jen statisticky.

A real card from the Biomedical Technology programme, in Czech.

Athena breaks every exam question of your programme into flashcards and brings each one back just before you would forget it. Brain dumps show where your answer still has gaps, and a mock oral exam lets you practise speaking against the clock, the way you will in front of the board. So far it covers two programmes at ČVUT: Biomedical Technology (Bc.) and Project Management of Innovation in Enterprise (Ing.). In the app it goes by its Czech name, Státnice v kapse.

Platform: Web, on phone and computer, Czech and English
Price: Free to try, full access €19 for 6 months or €6.99 a month
State: Runs at athena.aiathand.com

Open Athena

Who is behind it

AiAtHand s.r.o. is a Czech company. Behind it are Adam and Sarah Rojík.