X vs StudyFetch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
X
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X-ray Scattering Simulator is a mobile application tool for demonstrating radiation scattering virtually. The demonstrated data is based on real life measurements in a hospital environment. The application is based on Augmented Reality technology (AR) that allows the user to add virtual 3D elements to the real-world environment through the camera of the mobile device. The objects in this application are the patient, X-ray machine and a color map depicting the radiation scattering. The purpose of this application is to demonstrate how the radiation generated during the X-ray imaging scatters to the environment.
StudyFetch
Transform your course materials into interactive study tools with AI. Upload lectures, PDFs, or videos to generate flashcards, quizzes, and notes. Engage with a personal AI tutor for real-time learning support and track your progress.
- AI-generated flashcards and quizzes
- Personal AI voice tutor
- Real-time lecture transcription and notes
- Progress tracking and achievements
- Support for 20+ languages
- Converts lectures, PDFs, slides, videos to study formats
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Designed by learning experts and used by millions of students worldwide, StudyFetch turns your own course materials into a study plan built around how you learn. Upload your lectures, PDFs, slides, or videos and get flashcards, quizzes, notes, and a personal AI tutor in seconds. Learning should meet you where you are, not the other way around. Every feature is built for lasting understanding so it is still there when exam day comes. How it works: Drop in your material and Sparky, your personal AI tutor, creates a comprehensive study plan and breaks it into the formats proven to help you remember. You are always learning in the way that works for you. What you get: · Flashcards, quizzes, and detailed notes generated from anything you upload · Sparky, a voice-to-voice AI tutor you can talk with anytime, on any topic · Real-time lecture recording that transcribes and turns class into notes as you go · Progress tracking that shows what you have down and what needs more focus · Achievements and daily streaks to keep you consistent · Support for 20+ languages Why students trust StudyFetch: 92% of students who use StudyFetch report improved grades. Millions of students worldwide use it to prep for exams, master course content, and build knowledge that lasts. Whether you are in high school, university, or learning on your own, StudyFetch adapts to you. StudyFetch is backed by Owl Ventures and The College Board and built to help you actually learn, not to hand you the answer and move on. Your future is in your hands. StudyFetch is here to help you see it. App EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: X at none against StudyFetch's 12. X also leads on iOS requirement (12.0 vs 17.0). StudyFetch's advantage is update cadence (every 10 days vs every 4 months) and chart position (#108 vs unranked). On price, ads 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
Both are free to download. StudyFetch sells 12 in-app purchases, starting at $9.99 per month. X asks for nothing beyond the download.
X ships an update every 4 months, StudyFetch every 10 days. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.
| Parameter | X | StudyFetch |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (15K ratings) — better |
| Positive reviews | — | 33.1% of reviews |
| Number of ratings | — | 15K — better |
| Update frequency | Every 4 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | #108 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 79 MB | 248 MB |
| Age rating | 4+ | 4+ |
| Developer | University of Oulu | Study Fetch |
Bugs and requests
X
Not enough reviews yet to summarise bugs or requests.
StudyFetch
Reported bugs
4 issues- Inability to upload or load materials
- Chatbot and tutor features not working
- Inconsistent performance across platforms
- Account and payment issues
Requested features
4 requests- Sync accounts across devices
- Improve PDF and document handling
- Enhance live lecture recording and transcription
- Add more test questions and practice content
In-app purchases
X
No in-app purchases
StudyFetch
- StudyFetch Explainers Basic$9.991 Month
- StudyFetch Explainer Basic$9.991 Month
- StudyFetch Explainers Premium$19.991 Month
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- StudyFetch Explainer Premium$19.991 Month
- StudyFetch Premium Monthly$19.991 Month
- StudyFetch Premium Quarterly$29.003 Months
- StudyFetch Explainer Basic$83.991 Year
- StudyFetch Premium YearlyTrial$96.001 Year
- StudyFetch Premium Yearly$96.001 Year
- StudyFetch Explainer Premium$167.991 Year
- Call Spark.E 1 Hour$7.49
- Call Spark.E 5 Hours$25.00









