For teachers · useful for other texts too
Built for teachers, but useful for other texts too: simply take a photo of the page, let Tuba mark handwritten or typed work against your rubric and review the correction.
No credit card · base from 3 red pens · no subscription · EU-hosted
Tuba Correction
English · 2 pages · 1 min ago
Transcription
My summer holyday1 in Greece was great. I has went2 to the beach.
Corrected
My summer holiday in Greece was great. I went to the beach.
Rubric
Suggestion · not an auto-grade
18/20
What a correction looks like
Transcription · Year 9 · English
Tuba correction
Last summer my family and I went on a holyday1 to Greece. We has went2 to the beach every day and eat3 a lot of ice cream.
„y" becomes „i" + „day".
No auxiliaries in Past Simple.
Past, parallel to „went".
How it works
Photograph handwritten or typed pages on your phone. Tuba reads them as one connected piece of student work.
Pick grade level, modules and rubric criteria — or stick with the defaults.
Transcription, marking, feedback, points — side by side. You decide what makes it into the grade. Tuba never grades without you.
What Tuba does differently
Instead of auto-graded score
With Tuba
Rubric suggestion — you make the call.
Instead of subscription with lock-in
With Tuba
Pay-per-use: 12 free red pens, no commitment, no expiry.
Instead of scanner & desktop
With Tuba
A phone photo is enough — handwritten or typed, several pages at once.
Instead of cloud somewhere
With Tuba
Hosted in the EU, account deleted on click, no tracking pixels.
What stays, even when the AI gets it wrong
One email to sign up, one click to delete. We do not store original images permanently; saved texts can be deleted in your account. App data is hosted in the EU, with no tracking pixel or third-party analytics.
Buy red pens once — leftovers never expire. If an analysis fails, they flow back automatically. No renewal, no newsletter without your opt-in, no paywall that suddenly appears.
Tuba suggests, and the model gets things wrong — sometimes even on correctly spelled words. That is why the original and the suggestion sit side by side, every mark with a reason. Accept, adjust or reject — it is your call.
Red pens(credits)
12 free red pens to start. After that, buy packs — only for the corrections that actually save time. No subscription, no hidden fees, no expiry.
Base pack
transcription, correction, error analysis
from3
per correction (2 pages included)
Add-on
feedback, rubric assessment, evaluation — opt-in
each+1
on top of base
Add-on
first 2 included, from page 3 extra
each+1
on top of base
AI correction for school and teaching
Built for teachers, but useful for other texts too: Tuba marks photographed essays and assignments with markings and explanations.
Simply take a photo. Tuba transcribes handwriting and print before correction, feedback and rubric-based grading are created.
Phone photo instead of retyping: read several pages, review marked corrections and export the final PDF.
FAQ
12 red pens come free with your account, no payment details required. Buy packs only when you run out.
A base correction (2 pages, with error analysis) costs 3 red pens; a full correction with every module (feedback, grading, evaluation) costs 6 red pens. The Teacher pack (€24) includes 90 red pens — that is 15 full corrections or 30 base corrections, roughly €0.80 per base correction. The School pack (€69) brings it down to around €0.69 per base correction.
No. Tuba provides suggestions: transcription, markings with reasons, feedback, and optional points against your rubric. You set the grade.
Yes. Tuba reads handwritten and typed text from phone photos. Good lighting and a flat angle noticeably improve accuracy.
App data is hosted in the EU. We do not permanently store original images; saved texts can be deleted from your account at any time. No tracking pixels, no third-party analytics.
No. You buy red pens once and they never expire. If an analysis fails, they flow back automatically.