# Simubus vs RefCalc

The clearest difference is price: Simubus at Free against RefCalc's $1.99. Simubus also leads on device support (3 vs 1). RefCalc's advantage is in-app purchases (none vs 3). On ads and iOS requirement there is nothing between them.

Simubus is free to download; RefCalc costs $1.99 up front. Simubus sells 3 in-app purchases, starting at $12.90 per month. RefCalc asks for nothing beyond the download.

## The numbers

| Metric | Simubus | RefCalc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 60 MB | 31 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Chongqing Shengniu Technology Co., Ltd](https://appshunter.io/developer/1868286779) | [Duong Nguyen Huu](https://appshunter.io/developer/1887479789) |

## What reviewers say

### Simubus

[App page](https://appshunter.io/ios/app/simubus/id6757686667)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Subscription | $12.90 | per month |
| Yearly Pro Subscription | $69.99 | per year |
| Lifetime | $79.99 | one-time |


### RefCalc

[App page](https://appshunter.io/ios/app/refcalc-refrigerant-pt-chart/id6793166788)

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

**In-app purchases:** none


## Frequently asked questions

### Is Simubus free?

Simubus is free to download, with in-app purchases available.

### Is RefCalc free?

RefCalc costs $1.99, with no in-app purchases.

### Do Simubus or RefCalc have ads?

Neither Simubus nor RefCalc shows ads.

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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.*