Comparison

Questi vs PDF Grader PRO

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Questi

This AI-powered app provides clear explanations for complex problems across all academic levels, from elementary to university. It helps users understand the essence of problems, maximize learning efficiency, and offers accessibility on multiple devices.

Highlights
  • AI-powered explanations
  • Covers all academic levels
  • In-depth understanding
  • Maximize learning efficiency
  • Accessible on PC, tablet, smartphone
Features
Read full description

Introducing Questi: Your AI-Powered Solution Helper for Advanced Problems! Questi has finally arrived to provide clear explanations for challenging problems across all subjectsβ€”from elementary and high school to university-level questions. Stop worrying about tough university and civil service exam questions. With Questi, get quick and easy explanations anytime! Why Choose Questi? In-Depth Understanding: Don't just solve problemsβ€”understand their essence and develop the ability to tackle similar challenges. Maximize Learning Efficiency: Enhance your comprehension of difficult concepts through clear explanations and interactive conversations with AI. Accessible Anytime, Anywhere: Available on PC, tablet, and smartphone, so you can find answers wherever you are. Experience high-level problem-solving now with Questi!

About

PDF Grader PRO

Features
Read full description

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 β€’ Import PDF exam papers and student answer sheets β€’ Grade by student or move through the same question across every student β€’ Define answer areas, point values, rubrics, and reusable checklist items β€’ Add partial credit and adjust scores while reviewing each response β€’ Reuse saved templates for future grading sessions β€’ Add more student answer sheets to an existing grading project HANDWRITTEN FEEDBACK β€’ Write directly on PDFs with Apple Pencil or touch β€’ Use pens, highlighters, erasers, lasso selection, and reusable stamps β€’ Add text comments, images, and model-answer annotations β€’ Keep handwriting and grading marks in exported student PDFs OPTIONAL AI-ASSISTED WORKFLOWS β€’ Analyze an exam PDF to draft question structure and answer areas β€’ Generate editable rubric and model-answer drafts from your references β€’ Grade selected answers against your rubric and review suggested feedback β€’ 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 β€’ Export score reports to Excel or CSV β€’ Save annotated PDFs or split them into individual student files β€’ Package student PDFs together as a ZIP archive β€’ Export portable .pdfgp project files containing the PDF, grading data, and ink β€’ Export reusable grading templates as JSON ORGANIZED FOR REPEATED USE β€’ Keep active and completed grading sessions in a visual library β€’ Separate grading sessions from reusable templates β€’ Automatically save work and reopen projects later β€’ 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

Questi4 screens
PDF Grader PRO4 screens

Verdict

The call

The clearest difference is price: Questi at Free against PDF Grader PRO's $4.99. Questi also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.6). PDF Grader PRO's advantage is update cadence (every 3 days vs weekly). On in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Questi 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.

UpkeepUpdate frequency

Questi ships an update weekly, PDF Grader PRO every 3 days. Both last shipped on October 7, 2026.

Scorecard4 real differences Β· 4 level
Questi versus PDF Grader PRO: the parameters behind the verdict, then further details
ParameterQuestiPDF Grader PRO
PriceFree β€” better$4.99
Positive reviews83.9% of reviewsβ€”
Update frequencyWeeklyEvery 3 days β€” better
AdsNo β€” betterYes
In-app purchasesNoNo
MonetizationFreeβ€”
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.1 β€” better17.6
Further details β€” not scored
Size14 MB12 MB
Age rating4+4+
DeveloperBnz IncHyeonchan Yu

In-app purchases

None

Questi

No in-app purchases

None

PDF Grader PRO

No in-app purchases

Questions

Is Questi free?
Questi is free to download, with no in-app purchases.
Is PDF Grader PRO free?
PDF Grader PRO costs $4.99, with no in-app purchases.
Do Questi or PDF Grader PRO have ads?
PDF Grader PRO shows ads; Questi does not.
Which is updated more often, Questi or PDF Grader PRO?
Questi ships an update weekly, and PDF Grader PRO every 3 days. Most recently, Questi was updated on October 7, 2026 and PDF Grader PRO on October 7, 2026.

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