Comparison

PP+ Simple Harmonic Motion vs AP Physics C, 2e

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

AP Physics C, 2e

Read full description

Practice! Practice! Practice! Essential practice questions for AP Physics C ― updated to reflect the latest exam. Organized for easy reference and tailored to help you maximize your study time, 500 AP Physics C Questions to Know by Test Day, 2e offers extensive review and rigorous practice. The 5 Steps team brings you the vital resources you need to help you score that 5! -500 AP-style questions and answers referenced to core AP materials -NEW: A 20-question diagnostic quiz -Questions that parallel the topic, format, and degree of difficulty of your AP exam -Comprehensive, easy-to-understand explanations -Ideal and effective last-minute practice This free application includes all questions in Chapter 1 - Kinematics (1-50). The remaining 450 questions are available with a subscription. This app has been designed for the iPhone/iPad with interactive features. -Study/Timed Exam/Bookmark modes are available for review. -In the Study mode, check the answers as you tackle the questions. -In the Timed Exam mode, time yourself and review the answers after the time is up. -In the Bookmark mode, review only the questions you have flagged for further study. -File away correctly answered questions after each practice test. -Opt to include questions from previous quizzes. -Store practice test scores to track your progress. -Save your work to the iCloud to access on multiple devices. About the Authors Hugh Henderson teaches AP Physics at Booker T. Washington School for the Performing and Visual Arts in Dallas and has been an educator for more than 30 years. He is a former member of the AP Test Development Committee and was an AP Physics Reader for more than a dozen years. Jeff Steele is an adjunct instructor in physics at Randolph College. He holds a bachelor's degree in nuclear engineering from UC Santa Barbara and a master's degree in physics education from the University of Virginia. He has taught physics at Randolph College, University of Lynchburg and the University of Virginia. Expanded Apps Privacy Policy: https://expandedapps.com/privacy-policy/ Expanded Apps Terms of Use: https://expandedapps.com/terms-of-use/

Screenshots

AP Physics C, 2e4 screens

Verdict

The call

The clearest difference is price: AP Physics C, 2e at Free against PP+ Simple Harmonic Motion's $1.99. AP Physics C, 2e also leads on update cadence (every 7 months vs every 29 months) and device support (3 vs 1). PP+ Simple Harmonic Motion's advantage is in-app purchases (none vs 5). On ads 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

AP Physics C, 2e is free to download; PP+ Simple Harmonic Motion costs $1.99 up front. AP Physics C, 2e sells 5 in-app purchases, starting at $5.99 per 7 days. PP+ Simple Harmonic Motion asks for nothing beyond the download.

UpkeepUpdate frequency

PP+ Simple Harmonic Motion ships an update every 29 months, AP Physics C, 2e every 7 months. The most recent releases landed on June 8, 2026 and September 17, 2026 respectively.

Scorecard5 real differences Β· 3 level
PP+ Simple Harmonic Motion versus AP Physics C, 2e: the parameters behind the verdict, then further details
ParameterPP+ Simple Harmonic MotionAP Physics C, 2e
Price$1.99Free β€” better
Positive reviews0.0% of reviewsβ€”
Update frequencyEvery 29 monthsEvery 7 months β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
MonetizationPaidβ€”
DevicesiPadiPhone, iPad, iPod β€” better
Requires iOS18.015.6 β€” better
Further details β€” not scored
Size115 MB57 MB
Age rating4+4+
DeveloperPolyhedron Learning Media, Inc.Expanded Apps

In-app purchases

None

PP+ Simple Harmonic Motion

No in-app purchases

5 purchases

AP Physics C, 2e

Subscriptions4
  • 1 Week$5.997 Days
  • 1 Week$6.997 Days
  • 1 Month$17.991 Month
Show 1 more
  • 1 Year$69.991 Year
One-time1
  • AP Physics C, 2e - Test Prep$15.99

Questions

Is PP+ Simple Harmonic Motion free?
PP+ Simple Harmonic Motion costs $1.99, with no in-app purchases.
Is AP Physics C, 2e free?
AP Physics C, 2e is free to download, with in-app purchases available.
Do PP+ Simple Harmonic Motion or AP Physics C, 2e have ads?
Neither PP+ Simple Harmonic Motion nor AP Physics C, 2e shows ads.
Which is updated more often, PP+ Simple Harmonic Motion or AP Physics C, 2e?
PP+ Simple Harmonic Motion ships an update every 29 months, and AP Physics C, 2e every 7 months. Most recently, PP+ Simple Harmonic Motion was updated on June 8, 2026 and AP Physics C, 2e on September 17, 2026.

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