Viewing Results
Discover how results are organised and how to view the validated worksheets
Mark Maths Worksheets & Drills in SecondsMark Maths Worksheets & Drills in Seconds | redmarker
The redmarker app uses your phone to check completed maths worksheets and drill sheets in seconds — organise by student or group, track accuracy, and cut marking time by up to 93%. Built for teachers and tutors who mark at volume; parents use the same app for homework at home.
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Sound Familiar?
What marking a week of drill sheets really looks like for teachers and tutors.
Hours lost every week
Dozens of students, about 40 questions each. At 35 seconds a question, marking the week's drill sheets takes hours tutors could spend teaching.
Inconsistent feedback
Different tutors mark differently. When you're tired, errors creep in and quality varies across rooms — until a manager spots the gap.
No centre-wide view
Spreadsheets and memory only go so far. Without accuracy over time by student or group, gaps surface late — in tests, reports, or parent conversations.
Now the Easy Way
Smart Scanning
Aim your phone at a worksheet. redmarker finds the page edges, crops automatically, and gives you a clean frame. No perfect angle needed.
Quick Results
Photo in, results out. redmarker reads the worksheet, checks every answer, and highlights exactly what needs more practice, in seconds.
Organisation
Every scan files itself. redmarker reads the name or class on the worksheet and sorts it automatically so your results are always organised, without you lifting a finger.
Progress Tracking
Accuracy charts build as you scan, so centre managers and tutors see improvement and rough spots at a glance — by student, group, or room.
Manual Corrections
You're always in control. Tap any result to correct a misread expression or answer, and redmarker recalculates instantly.
Flexibility
Works with the drill sheets your centre already uses — printed Kumon-style sheets, tutor homework, or handwritten practice pages.
Who It's For
Same problem, different scale — a pile of paper maths that needs checking. Teachers, tutors, and parents use redmarker; tutoring centres can book a demo for higher volume.
Private tutors
Run 10–30 students from one app — organise by learner, track progress between sessions, and cut marking before each lesson.
Teachers
Mark a class set faster, see who is falling behind, and keep feedback consistent without eating your evenings.
Parents
Mark homework in seconds instead of spending your evening with a red pen. Same app tutors use — built for drill sheets and ordinary worksheets.
Tutoring centres
Marking at centre scale needs volume, consistency, and GDPR-ready processing. <a href="/business" class="text-brand-accent underline decoration-brand-accent/40 underline-offset-2 hover:decoration-brand-accent/70">See the centre overview</a> or book a demo.
Messy Handwriting
- Scribbles, smudges, eraser marks: no problem
- Ticks stay tight to each answer, even on crowded pages
- Spot what needs revision at a glance, without another full re-mark
How It Works
Step by Step
14 steps featured: browse them all or jump straight to one.
01
Capture Worksheet
Point your camera at a maths worksheet. The app shows a capture box overlay. Tap to capture or use Smart Scan to capture multiple worksheets quickly.
- Manual capture with torch control and auto-cropping
- Smart Scan captures multiple worksheets in sequence
- Handles messy handwriting
- When capturing a booklet, student information from the first worksheet automatically applies to subsequent worksheets.Quickly disable this feature by tapping the control that appears in the header.
02
Organisation
Sorted the way real sheets arrive at your centre: by group, by student, always where tutors expect it.
- Student name detection, either hand written or printed
- Class identification, either hand written or printed
- Hierarchical folder structure
- Limit the number of cards visible on each page using the pagination controls in the header
03
Visual Feedback
See the marked worksheet on screen, with every suspected mistake highlighted in red. Pinch to zoom in on any answer, or check the summary table for a full picture at a glance.
- Pinch-to-zoom and pan gestures
- Red markers on suspected incorrect answers
- Collapsible discrepancies table
04
Track Progress
View detailed progress charts showing accuracy over time. See statistics, trends, and who needs extra practice.
- Visual accuracy charts
- Trend indicators (improving/stable/declining)
- Best and worst performance highlights
- Click a data point on the graph or a worksheet history entry to view the corresponding worksheet
05
Accessing Results
Manually correct results when the app misreads handwriting.
- Swipe right on the worksheet to reveal the Results button
What markers are saying
Early feedback from teachers, tutors, and centre teams in our beta programme · full quotes on the testimonials page.
After 3 weeks of use
I was marking 15 students' drill sheets every week by hand. Now I scan, skim the flags, and I'm done in twenty minutes. I walk into sessions knowing who struggled last week.
James Hartley — Manchester
Private maths tutor
Private tutor, 18 students
We were losing tutor evenings to marking drill sheets. In the pilot, tutors scan, skim results, and move on — we're getting hours back every week without cutting feedback quality.
Sarah Mitchell — Bristol
Centre manager, maths tutoring programme
Centre pilot
Different tutors used to mark differently. Now we get consistent checks and accuracy charts by student — gaps show up early instead of at parents' evening.
David Okonkwo — Reading
Lead tutor, Kumon-style programme
Frequently Asked Questions
Signing in keeps your credits attached to you, not your device. It also prevents the free allowance from being abused, which keeps it available for genuine users.
Very. redmarker reads both printed and handwritten maths with high accuracy, and shows a confidence score for every read so you can see exactly how certain it is. If anything looks off, a quick tap lets you correct it on the spot.
Your photos never live on our servers. When you scan a worksheet, the image is sent securely to OpenAI's OCR service to read the maths directly from your device. OpenAI doesn't use your images for training, and everything else stays on your device only. We only share what's necessary to make the marking work. Nothing more.
redmarker requires an internet connection to process worksheets with OCR. However, once worksheets are processed, you can view results, track progress, and organise worksheets offline. The app also includes a background processing queue, so worksheets captured while offline will be processed automatically when you reconnect to the internet.
redmarker works on iOS 13.0 or later and Android 8.0 (API level 26) or later. The app is optimised for modern devices and takes advantage of the latest mobile technologies for the best performance and accuracy.
Yes, you can export your worksheet data from the app. Use the export option in Settings to back up your data. Export and deletion features are available to give you full control over your information.
When you exceed your monthly free allowance, you can buy worksheet credit packs in the app (Essentials Pack: 50 credits, Value Pack: 200 credits). Credits are used automatically. Purchased credits expire after 1 year of account inactivity. Sign in at least once a year to keep your account active. View credit packs →
redmarker includes a free tier with 10 credits per month for individual tutor accounts; your allowance resets each month and unused credits don't roll over. Tutoring centres and maths programmes can book a demo for institutional pricing with higher volume. See full pricing →
No. Every update, new feature, and improvement is included. Nothing extra, ever. Just keep the app and you'll get everything as it arrives.
Yes. If something isn't working, reach out directly through the Settings screen and we'll get it sorted. We're a small team and take every support request personally.
Yes. redmarker already works with a wide range of printed and handwritten worksheet styles, and we're continuously adding more. If there's a format it doesn't handle yet, let us know. Any updates are included at no extra cost.
No. redmarker is a maths worksheet marking app, not a worksheet library like math-drills.com or K5 Learning. You use your own maths worksheets or maths drill sheets (including Kumon-style practice). Photograph the completed sheet and redmarker checks the answers in seconds.
What teachers and tutors do next
Download the app free, compare plans and credit packs, read what markers say, or browse practical guides on the blog. Tutoring centres can book a demo.
Your Privacy & Security
We never store your worksheet images on our servers
Data Privacy
All worksheet images and student data are stored locally on your device. We never store your images or personal information on our servers. Your data stays in your control.
Secure Image Processing
Images are processed securely through encrypted connections and immediately deleted after processing. We use industry-standard encryption to protect your data in transit.
GDPR Compliant
We comply with GDPR and other data protection regulations. You have full control over your data with export and deletion features. Privacy Policy
Your data, your control. All worksheet images and student information are stored exclusively on your device. We only store minimal metadata (usage counts, account linkage for quota) associated with an anonymous token, never personal information.
Transparent Pricing
10 credits/month on Free, resetting monthly; unused credits don't roll over.
Top up with an Essentials or Value pack in the app (pay-as-you-go). Indicative prices are shown on the cards.
Add Credits (Top-Up)
Free
Perfect for trying out redmarker
- 10 worksheet credits per month
- OCR-powered validation
- Organisation & filtering by learner or class
- Progress tracking
- Manual corrections
- Works with leading maths-drill worksheets
- Concurrent processing
Essentials Pack
50 Worksheet Credits
£3.99
8.0pper credit
- All Free features, plus your purchased credits.
- Priority support
- Paid credits apply automatically after your monthly free allowance.
- Smaller top-up when you only need a modest number of extra credits.
Value Pack
200 Worksheet Credits
£11.99
6.0pper credit
- All Free features, plus your purchased credits.
- Priority support
- Paid credits apply automatically after your monthly free allowance.
- Larger bundle, more credits in one purchase for heavier marking volume.
Purchased credits expire after one year of account inactivity. Sign in at least once a year to keep credits and your account active.
Prices shown are INDICATIVE only. For accurate pricing in your region, see the App Store or Google Play Store.
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Tutoring centre or maths programme marking at scale? Book a demo
Ready to Save Hours Every Week?
Download redmarker free and mark your next stack of worksheets in minutes. Tutoring centre? Book a demo instead.
Free on iOS and Android · 10 worksheet credits per month
