PP+ Simple Harmonic Motion vs GRADED+ Student Work Scanner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PP+ Simple Harmonic Motion
Explore the principles of simple harmonic motion with a virtual spring-mass system. This educational tool provides realistic 3D simulations, data analysis tools, and comprehensive learning materials for students.
- 3D spring-mass simulation
- Realistic data with errors
- Data analysis and reporting tools
- Introductory videos and background theory
- Pre-lab quiz and post-lab questions
- Teacher support materials
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The Simple Harmonic Motion lab uses a spring-mass system to investigate relationships between the spring constant, mass, amplitude of oscillation, and period of oscillation for a mass on a spring. It is part of Polyhedron Physics Plus, a set of 24 iPad apps for use in the classroom. To see how they work, try the FREE PP+ Newton’s 2nd Law lab. For those who’d prefer to develop their own experiments, the PP Spring Mass System app features a similar apparatus without lab procedures and other supporting materials. In addition to a 3D simulation that produces realistic data, each lab includes introductory videos, background theory, experimental procedure, analysis and reporting tools, pre-lab quiz, post-lab questions, and teacher support materials. The experimental data produced by the simulations are realistic, including random and systematic errors. These features allow students to use standard data analysis and error analysis techniques to report on their own unique data, just as if the experiment had been performed using hands-on equipment. These labs can serve as replacements for hands-on labs, especially when equipment is not available, or as supplements to hands-on labs. They are also a suitable option for students in distance learning and home school situations. Formative and summative evaluations showed no significant difference in learning between students using the virtual labs and those using hands-on labs. Preliminary results suggest increased learning by students using the virtual labs as supplements to hands-on. Polyhedron Physics was developed by Polyhedron Learning Media, Inc. with partial funding provided under contract numbers ED-07-CO-0040 and ED-IES-11-C-0029 from the Institute of Education Sciences in the U.S. Department of Education through the Small Business Innovation Research (SBIR) program.
GRADED+ Student Work Scanner
This app helps teachers create and analyze single-question formative assessments focused on problem-solving and short-response writing. It allows for easy scanning of student work via phone camera, with results automatically saved to Google Drive and Classroom for progress tracking.
- Single-item formative assessments
- Scan student work with phone camera
- Auto-save to Google Drive/Classroom
- Standards-based gradebook
- Digital student work portfolio
- Exit ticket analysis
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STANDARDIZED TESTING IS SUCKING THE OXYGEN OUT OF THE ROOM! GRADED+ promotes and encourages problem solving (MATH) and short response writing (ELA) in contrast to overly used multiple choice tests. Let's center the conversation on student work using teacher-assigned formative assessments. Single question formative assessments–assigned by the teacher, aligned to the current lesson, with a focus on actual student work. GRADED+ features: Auto saves to Google Drive and Google Classroom Standard Performance Tracker Standards-Based Gradebook Digital Student Work Portfolio Formative Assessment Portfolio Exit Ticker Analyzer THREE-STEP PROCESS TO TRANSFORM ASSESSMENTS IN YOUR SCHOOL: 1. Assign One-Item Assessments On Any Paper 2. Scan Student Work With Your Phone's Camera 3. View Results In Your Data Dashboard & Google Drive For more information visit https://www.solvedconsulting.com/graded.html
Screenshots
Verdict
The clearest difference is review sentiment: GRADED+ Student Work Scanner at 67% against PP+ Simple Harmonic Motion's 0%. GRADED+ Student Work Scanner also leads on price (Free vs $1.99) and update cadence (every 6 days vs every 29 months). PP+ Simple Harmonic Motion's advantage is ads (none vs shown). On in-app purchases 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
GRADED+ Student Work Scanner is free to download; PP+ Simple Harmonic Motion costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PP+ Simple Harmonic Motion ships an update every 29 months, GRADED+ Student Work Scanner every 6 days. The most recent releases landed on June 8, 2026 and September 24, 2026 respectively.
| Parameter | PP+ Simple Harmonic Motion | GRADED+ Student Work Scanner |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | 0.0% of reviews | 66.7% of reviews — better |
| Number of ratings | — | 7 — better |
| Update frequency | Every 29 months | Every 6 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 115 MB | 78 MB |
| Age rating | 4+ | 4+ |
| Developer | Polyhedron Learning Media, Inc. | Solved Education Consultancy, LLC |
Customer experience
PP+ Simple Harmonic Motion
GRADED+ Student Work Scanner
In-app purchases
PP+ Simple Harmonic Motion
No in-app purchases
GRADED+ Student Work Scanner
No in-app purchases
Questions
Is PP+ Simple Harmonic Motion free?
Is GRADED+ Student Work Scanner free?
Do PP+ Simple Harmonic Motion or GRADED+ Student Work Scanner have ads?
Which is updated more often, PP+ Simple Harmonic Motion or GRADED+ Student Work Scanner?
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