# Simple Pendulum Calculator vs 7Charge

The clearest difference is price: 7Charge at Free against Simple Pendulum Calculator's $2.99. 7Charge also leads on update cadence (every 5 months vs every 31 months) and ratings volume (374 vs 1). Simple Pendulum Calculator's advantage is rating (5.0 vs 4.7). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

7Charge 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.

Simple Pendulum Calculator holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: 7Charge has 374 ratings behind it against 1, so its average is the more settled of the two.

Simple Pendulum Calculator ships an update every 31 months, 7Charge every 5 months. The most recent releases landed on September 29, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Simple Pendulum Calculator | 7Charge |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simple-pendulum-calculator/id1397285555/reviews)** | [4.7 (374 ratings)](https://appshunter.io/ios/app/7charge/id1616043788/reviews) |
| Number of ratings | 1 | **374** |
| Positive reviews | — | 76.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 5 months** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 47 MB |
| Requires iOS | 13 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [7-Eleven, Inc.](https://appshunter.io/developer/589653417) |

## What reviewers say

### Simple Pendulum Calculator

[App page](https://appshunter.io/ios/app/simple-pendulum-calculator/id1397285555)

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:** macOS Compatibility

**In-app purchases:** none


### 7Charge

[App page](https://appshunter.io/ios/app/7charge/id1616043788)

Find, access, and pay for electric vehicle charging stations with ease. This app uses location services to show available stations, their power levels, and accessibility. Start charging sessions via QR code or station ID and monitor your progress in real-time.

**Highlights:** Location-based EV station search, Real-time charge session monitoring, QR code or station ID charging start, Secure in-app payments, Favorite charging locations, Charging session history and receipts

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast charging
- 👍 Convenient location
- 🚀 Charges quickly
- 👍 Easy to use app
- 👍 Clean and well-maintained

**What reviewers complain about**

- 💰 Expensive
- 🐛 Connectivity issues
- 🐛 Unreliable performance
- 💰 High authorization hold
- 🔌 Slow charging speed

**Reported bugs**

- Charging sessions disconnecting
- App issues with payment methods
- Charging stations not working
- Inaccurate charging speed information

**Requested features**

- Tap-to-pay option
- Rewards program integration
- Reservation system
- More charging stations needed


## Frequently asked questions

### Is Simple Pendulum Calculator free?

Simple Pendulum Calculator costs $2.99, with no in-app purchases.

### Is 7Charge free?

7Charge is free to download, with no in-app purchases.

### Which has better reviews, Simple Pendulum Calculator or 7Charge?

Simple Pendulum Calculator is rated higher. Simple Pendulum Calculator averages 5.0 out of 5 from 1 ratings, while 7Charge averages 4.7 from 374 ratings.

### Do Simple Pendulum Calculator or 7Charge have ads?

Neither Simple Pendulum Calculator nor 7Charge shows ads.

### Which is updated more often, Simple Pendulum Calculator or 7Charge?

Simple Pendulum Calculator ships an update every 31 months, and 7Charge every 5 months. Most recently, Simple Pendulum Calculator was updated on September 29, 2026 and 7Charge on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*