Comparison

Simple Pendulum Calculator vs 70 Degree

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

Head to head
About

Simple Pendulum Calculator

This physics calculator quickly computes pendulum period, frequency, maximum height, energy, and speed. It supports various units, offers instant calculations with copyable results, and includes formulas for reference. Designed for privacy and efficiency, it works seamlessly on iOS devices.

Highlights
  • Instant pendulum calculations
  • Copyable results
  • Included formulas
  • Supports various units
  • High precision (16 decimal places)
  • Ad-free and private
Features
Read full description

The Simple Pendulum Calculator is a physics/math calculator designed to find the pendulum period, frequency, maximum height, energy of the system, or speed at the bottom quickly and easily. Features: - Instant calculation. - Results are copyable to other apps. - Formulas are included as reference. - Supports up to 16 decimal places. - Supports various units for each input. - Works seamlessly on both iPhone and iPad. - Lightweight, compact app optimized for everyday use. - Ad-free and built with privacy in mind. A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force acting on the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum and also to a slight degree on the amplitude, the width of the pendulum's swing. Simple Pendulum equation: T = 2π * √L/g Where: T : Period of the simple pendulum L : Length of the pendulum g : Acceleration due to gravity, the standard gravity of Earth is 9.80665m/s2 The velocity at the bottom of the swing is: v = √2g * L * (1-cos(a)) Where: v : The velocity at the bottom of the pendulum a : The angle from the vertical The Maximum height is: H = L - L * cos(a) The system energy is: E = m * v2 / 2 Where: E : System energy m : Mass of the object v : The velocity at the bottom of the pendulum Thanks for your support, and do visit nitrio.com for more apps for your iOS devices.

About

70 Degree

This utility app helps you measure angles with your iPhone. It provides notifications when a target angle is reached, with options for visual and auditory alerts.

Highlights
  • Angle degree measurement
  • Customizable angle alerts
  • Visual strobe notifications
  • Auditory alerts
  • Vibration alerts
Features
Read full description

70degree can notify you when you have reached your desired angle, using red strobe color with a choice of sound, vibrate or both! Measure angle degree using iPhone has never been easier! Hope you enjoy using 70degree!

Screenshots

Simple Pendulum Calculator4 screens
70 Degree3 screens

Verdict

The call

The clearest difference is price: 70 Degree at Free against Simple Pendulum Calculator's $2.99. 70 Degree also leads on update cadence (every 6 months vs every 31 months) and ratings volume (10 vs 1). Simple Pendulum Calculator's advantage is rating (5.0 vs 2.9) and ads (none vs shown). On in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

70 Degree is free to download; Simple Pendulum Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Simple Pendulum Calculator holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: 70 Degree has 10 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Simple Pendulum Calculator ships an update every 31 months, 70 Degree every 6 months. The most recent releases landed on September 10, 2026 and September 19, 2026 respectively.

Scorecard6 real differences · 4 level
Simple Pendulum Calculator versus 70 Degree: the parameters behind the verdict, then further details
ParameterSimple Pendulum Calculator70 Degree
Price$2.99Free — better
Rating5.0 (1 ratings) — better2.9 (10 ratings)
Positive reviews—20.0% of reviews
Number of ratings110 — better
Update frequencyEvery 31 monthsEvery 6 months — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS1312.0 — better
Further details — not scored
Size1 MB19 MB
Age rating4+4+
DeveloperNitriosekleung chang

Customer experience

Simple Pendulum Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

70 Degree

All ratings10 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews5 reviews
Positive20.0%
Neutral0.0%
Negative80.0%

In-app purchases

None

Simple Pendulum Calculator

No in-app purchases

None

70 Degree

No in-app purchases

Questions

Is Simple Pendulum Calculator free?
Simple Pendulum Calculator costs $2.99, with no in-app purchases.
Is 70 Degree free?
70 Degree is free to download, with no in-app purchases.
Which has better reviews, Simple Pendulum Calculator or 70 Degree?
Simple Pendulum Calculator is rated higher. Simple Pendulum Calculator averages 5.0 out of 5 from 1 ratings, while 70 Degree averages 2.9 from 10 ratings.
Do Simple Pendulum Calculator or 70 Degree have ads?
70 Degree shows ads; Simple Pendulum Calculator does not.
Which is updated more often, Simple Pendulum Calculator or 70 Degree?
Simple Pendulum Calculator ships an update every 31 months, and 70 Degree every 6 months. Most recently, Simple Pendulum Calculator was updated on September 10, 2026 and 70 Degree on September 19, 2026.

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