# Thin Lens Equation Calc vs Hercules CyclePay

The clearest difference is price: Hercules CyclePay at Free against Thin Lens Equation Calc's $2.99. Hercules CyclePay also leads on update cadence (every 2 months vs every 27 months) and iOS requirement (12.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Hercules CyclePay is free to download; Thin Lens Equation Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Thin Lens Equation Calc ships an update every 27 months, Hercules CyclePay every 2 months. The most recent releases landed on October 25, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Thin Lens Equation Calc | Hercules CyclePay |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.4 (3.2K ratings)](https://appshunter.io/ios/app/hercules-cyclepay/id1520002517/reviews)** |
| Number of ratings | — | **3.2K** |
| Positive reviews | — | 41.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 1 MB | 23 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Hercules Corp](https://appshunter.io/developer/1520002519) |

## What reviewers say

### Thin Lens Equation Calc

[App page](https://appshunter.io/ios/app/thin-lens-equation-calc/id1414198278)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Hercules CyclePay

[App page](https://appshunter.io/ios/app/hercules-cyclepay/id1520002517)

Easily start washing machine and dryer cycles using your phone at participating laundry locations. Send service requests directly through the app for any issues encountered.

**Highlights:** Start washer and dryer cycles, Phone-based cycle activation, Send service requests, Real-time machine status (select locations)

**In-app purchases:** none

**What reviewers like**

- 🚀 Convenient app
- 👍 Easy to use
- 💡 Useful features like notifications

**What reviewers complain about**

- 🐛 Connectivity issues
- 🐛 Unreliable machine status
- 🐛 Slow performance
- 💰 Overcharging issues
- 🤖 Buggy and glitchy

**Reported bugs**

- Machines not connecting to app
- Incorrect cycle time reporting
- Charges without starting machines
- Frequent app crashes

**Requested features**

- Allow manual time input for dryers
- Improve machine status visibility
- Implement remote machine control
- Save payment information


## Frequently asked questions

### Is Thin Lens Equation Calc free?

Thin Lens Equation Calc costs $2.99, with no in-app purchases.

### Is Hercules CyclePay free?

Hercules CyclePay is free to download, with no in-app purchases.

### Do Thin Lens Equation Calc or Hercules CyclePay have ads?

Neither Thin Lens Equation Calc nor Hercules CyclePay shows ads.

### Which is updated more often, Thin Lens Equation Calc or Hercules CyclePay?

Thin Lens Equation Calc ships an update every 27 months, and Hercules CyclePay every 2 months. Most recently, Thin Lens Equation Calc was updated on October 25, 2026 and Hercules CyclePay on November 3, 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.*