Comparison

DR.Osci.HD vs Pendulum Lab

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

Head to head
About

DR.Osci.HD

Explore physics concepts with a spring pendulum simulation. Manipulate parameters like damping, spring flexibility, and mass to observe oscillations. Record and export displacement graphs for deeper analysis.

Highlights
  • Spring pendulum simulation
  • Adjustable damping, spring flexibility, and mass
  • Gravity simulation
  • Record displacement over time
  • Export graphs to photo library
Features
Read full description

In this simulation of a spring pendulum a mass is attached to two springs. You can touch the mass and move it out of its stable position. Or you can tilt your iOS device and watch gravity work. At all times you can alter the damping (k), the flexibility of the spring (D) and the mass of the steel ball (m). Take some time and play around with these parameters to become an expert in harmonic and not so harmonic oscillations. If you have found an interesting one, tap the graph button to record the displacement over the time. Tap the info button to enable or disable gravity and to export graphs into your photo library. Have fun learning physics! Use the app completely on your own risk and for educational purposes only. The simulation is an approximation. It might be wrong and different from reality.

About

Pendulum Lab

Features
Read full description

PendulumLab: Interactive Pendulum Physics Simulator Dive into the fascinating world of pendulum physics with PendulumLab! Whether you're a student, educator, or science enthusiast, this app brings the beauty and complexity of pendulum motion right to your fingertips. Key Features: Explore single, double, and triple pendulum systems Interact with real-time, visually stunning simulations Adjust parameters like length, angle, and gravity to see instant effects Visualize pendulum trajectories with customizable trails Toggle trajectory visibility for each pendulum bob Clear trajectories with a single tap for new experiments Perfect for: Students learning about harmonic motion and chaos theory Teachers demonstrating complex physics concepts Science enthusiasts curious about pendulum behavior Anyone fascinated by the interplay of physics and visual art Why PendulumLab? Intuitive controls make learning physics fun and accessible High-quality graphics provide a clear view of pendulum dynamics Real-time parameter adjustments allow for instant experimentation Trajectory visualization helps understand the complexity of multi-pendulum systems Unlock the secrets of pendulum motion, from simple harmonic oscillations to chaotic behavior. PendulumLab turns your device into a powerful physics laboratory, letting you explore, learn, and marvel at the wonders of motion. Download PendulumLab now and start your journey into the mesmerizing world of pendulum physics!

Screenshots

DR.Osci.HD2 screens
Pendulum Lab3 screens

Verdict

The call

The clearest difference is price: DR.Osci.HD at Free against Pendulum Lab's $0.99. DR.Osci.HD also leads on in-app purchases (none vs 1) and iOS requirement (9.1 vs 15.0). Pendulum Lab's advantage is update cadence (every 5 weeks vs every 12 months). On ads and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

DR.Osci.HD is free to download; Pendulum Lab costs $0.99 up front. Pendulum Lab sells 1 one-off in-app purchase. DR.Osci.HD asks for nothing beyond the download.

UpkeepUpdate frequency

DR.Osci.HD ships an update every 12 months, Pendulum Lab every 5 weeks. The most recent releases landed on October 1, 2026 and October 4, 2026 respectively.

Scorecard4 real differences ยท 4 level
DR.Osci.HD versus Pendulum Lab: the parameters behind the verdict, then further details
ParameterDR.Osci.HDPendulum Lab
PriceFree โ€” better$0.99
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 12 monthsEvery 5 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationFreeโ€”
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.1 โ€” better15.0
Further details โ€” not scored
Size2 MB4 MB
Age rating4+4+
DeveloperDaniel Rothhyeonsu jeong

In-app purchases

None

DR.Osci.HD

No in-app purchases

1 purchases

Pendulum Lab

One-time1
  • Triple Pendulum Unlock$0.99

Questions

Is DR.Osci.HD free?
DR.Osci.HD is free to download, with no in-app purchases.
Is Pendulum Lab free?
Pendulum Lab costs $0.99, and also offers in-app purchases.
Do DR.Osci.HD or Pendulum Lab have ads?
Neither DR.Osci.HD nor Pendulum Lab shows ads.
Which is updated more often, DR.Osci.HD or Pendulum Lab?
DR.Osci.HD ships an update every 12 months, and Pendulum Lab every 5 weeks. Most recently, DR.Osci.HD was updated on October 1, 2026 and Pendulum Lab on October 4, 2026.

Other comparisons