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Pricing

Generating charts is free. A plan gives you clean files and a preview without the watermark, and Pro adds the editor, AI and the API. By the week, month or semester, no auto-charges.

One file — one export

An export is a download of a clean file without the watermark. A lab with 30 functions is one export, and the same file in another format (Word, PNG, SVG, a structogram) doesn’t count again.

Free

$0

To try it out and submit your first lab.

  • Generating and previewing charts — unlimited, watermarked

  • Clean exports a month: 1

  • Telegram bot: your first chart in a group is free

Student

Popular

from $1.49 / week

For all the labs and coursework of a semester.

  • Clean exports — up to 300 a month, in all 12 formats

  • Preview without the watermark — just a small rombik.app mark in the corner

  • Charts in Telegram: send code to the bot, get the file back. Works in your class group too, even if the chat has no plan of its own

  • Export history and re-downloads

Pro

from $2.99 / week

When the chart has to match your teacher’s requirements.

  • Everything in Student

  • Chart editor: your own labels, Yes/No, “Figure N”, manual edits

  • AI generation from a description — when there’s no code

  • API, CLI and MCP — from agents, scripts and Claude/ChatGPT

Group chat

in Telegram

from $9.99 / month

For a course group: charts in the bot for the whole chat.

  • One plan for the whole chat — an admin pays, everyone draws

  • Up to 50 renders a day per chat

  • Every member makes their first chart for free

a chat of up to 40 members

Group chat plan: buy a voucher here and enter the code in the group with /redeem — or pay right in the bot with /topup.

About the bot

Payment terms

One-time payment via monobank Jar — no auto-renewal.

  • No auto-charges

    One-time payment for a period — no auto-charges.

  • Extending

    Extending adds the new days after the current ones; Pro on top of Student pauses it.

  • How many exports

    Up to 300 exports a month on Student, up to 1000 on Pro: a fair-use cap so one plan isn’t shared by a whole group.

  • Refunds

    Didn’t use the plan — we refund the payment (except Pro).

Prices are shown in USD before tax. Any VAT or sales tax applicable in your country is added at checkout, so your final total may differ.

Gift a plan

Pay for Student or Pro for someone else — the plan goes to their account by email.

Questions about paying or plans?

Message support — the reply comes here and to your email.