OMR Sheet Scanner vs Euclid Lab

OMR Grader turns your iPhone into a powerful answer sheet grading machine. Teachers, professors, and educators can create, scan, and grade multiple-choice bubble sheets in seconds — no expensive hardware needed. GENERATE CUSTOM ANSWER SHEETS Create professional OMR bubble sheets with 50, 100, 120, or 160 questions. Choose 2 or 4 column layouts. Add your school or institute name. Download as PDF ready to print on any standard printer. SET ANSWER KEYS IN SECONDS Tap bubbles on screen to set correct answers. Or scan a pre-filled master sheet and the app creates the answer key automatically. Set custom point values per question and penalty scoring for wrong or multiple-marked answers. SCAN AND GRADE INSTANTLY Point your camera at a filled answer sheet for instant grading. The app detects the sheet, reads every bubble, and shows the score in real time. Works with printed sheets from any standard printer. BATCH GRADING FOR LARGE CLASSES Have a stack of 100 or more sheets? Use any document scanner to digitize them, then load all images into Batch Scanner. The app grades every sheet automatically — saving hours of manual work. VIEW DETAILED RESULTS See each student's score with a color-coded annotated sheet showing correct, incorrect, empty, and multiple-marked answers. Identify which questions students struggled with most. EXPORT AND SHARE Export results as CSV spreadsheet, PDF report, or ZIP archive. Share with colleagues, administrators, or parents easily. PREMIUM FEATURES Free users get 20 scans per day. Upgrade to OMR Grader Premium for unlimited scans, batch grading, and priority support. Privacy Policy: https://omrgrader.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Explore the 48 propositions of Book I of Euclid’s Elements through reading, construction and proof practice. Euclid Lab separates proposition reading, straightedge-and-compass work and reasoning so you can focus on one activity at a time. Arrange supplied proof blocks to connect premises to conclusions. Scored exercises use semantic checks of geometric relationships and logical dependencies, not the appearance of a drawing or AI grading. Progressive hints and complete solutions, shown on request, help when you get stuck. I.7 currently offers unscored reading, exploration and notes. Freehand notes are also unscored and are not automatically verified as correct proofs. Foundations and I.1–I.12 are free. I.13–I.24 and I.25–I.48 are separate, one-time in-app purchases. Buying one pack does not unlock the other. No subscription is required. Learning progress and notes are stored locally on your device. Learner profiles are not Apple Accounts, and no Euclid Lab account registration is required. Restore Purchases restores eligible content access; it does not synchronize learning progress.