POSTECH ID vs PDF Grader PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
POSTECH ID
This app provides a mobile student and faculty ID for Pohang University of Science and Technology. It also functions as an access pass for external visitors to enter the library.
- Mobile student ID
- Mobile faculty ID
- Library access pass
- Replaces physical cards
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포항공과대학교 모바일 학생증 - 포항공과대학교 내 교직원 및 학생들이 사용하는 기존 카드를 대신하여 모바일 형태로 사용할 수 있는 학생증, 교직원증입니다. - 또한 도서관 출입을 원하는 외부 이용자들이 사용 가능한 출입증 기능도 포함하고 있습니다.
PDF Grader PRO
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PDF Grader Pro brings PDF grading, handwritten feedback, rubrics, and result export into one focused workspace for teachers and educators. Create reusable grading templates, import student answer sheets, and move through each paper without switching between multiple apps. Grade by student or by question, apply checklist-based rubrics and partial credit, then export annotated papers and structured score files. GRADE PDFs YOUR WAY • Import PDF exam papers and student answer sheets • Grade by student or move through the same question across every student • Define answer areas, point values, rubrics, and reusable checklist items • Add partial credit and adjust scores while reviewing each response • Reuse saved templates for future grading sessions • Add more student answer sheets to an existing grading project HANDWRITTEN FEEDBACK • Write directly on PDFs with Apple Pencil or touch • Use pens, highlighters, erasers, lasso selection, and reusable stamps • Add text comments, images, and model-answer annotations • Keep handwriting and grading marks in exported student PDFs OPTIONAL AI-ASSISTED WORKFLOWS • Analyze an exam PDF to draft question structure and answer areas • Generate editable rubric and model-answer drafts from your references • Grade selected answers against your rubric and review suggested feedback • Inspect and edit AI-generated results before applying them AI features are optional and require a Google AI API key entered by the user. AI-generated content may be incomplete or incorrect; the teacher remains responsible for reviewing scores, feedback, and final academic decisions. EXPORT AND BACKUP • Export score reports to Excel or CSV • Save annotated PDFs or split them into individual student files • Package student PDFs together as a ZIP archive • Export portable .pdfgp project files containing the PDF, grading data, and ink • Export reusable grading templates as JSON ORGANIZED FOR REPEATED USE • Keep active and completed grading sessions in a visual library • Separate grading sessions from reusable templates • Automatically save work and reopen projects later • Choose student-by-student or question-by-question workflows PRIVACY AND EXTERNAL PROCESSING Projects and grading results are stored on your device by default. PDF Grader Pro does not upload grading PDFs or student data to its own server. When you choose to use an AI feature, selected answer or PDF images, grading criteria, model answers, teacher feedback, exam information, and related template data may be sent directly to Google AI services using your API key. Processing and retention then follow Google’s applicable terms, settings, and privacy policy. Turn off AI features to use manual grading, annotation, export, and library storage without external AI requests. Third-party advertising services may process device and usage information according to your consent choices, device settings, and the app’s Privacy Policy. Before processing student materials, make sure you have the required permission and remove unnecessary personal, sensitive, or confidential information. Do not send such information through free AI services. PDF Grader Pro is built to support professional judgment, not replace it. Always review grading results before sharing them with students. Support: chani6361@gmail.com
Screenshots
Verdict
The clearest difference is price: POSTECH ID at Free against PDF Grader PRO's $4.99. POSTECH ID also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). PDF Grader PRO's advantage is update cadence (every 3 days vs every 5 months). On in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
POSTECH ID is free to download; PDF Grader PRO costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
POSTECH ID ships an update every 5 months, PDF Grader PRO every 3 days. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.
| Parameter | POSTECH ID | PDF Grader PRO |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 5 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Pohang University of Science & Technology | Hyeonchan Yu |
In-app purchases
POSTECH ID
No in-app purchases
PDF Grader PRO
No in-app purchases









