# Chemical Engineering Formulate vs MyPi.

The clearest difference is review sentiment: MyPi. at 69% against Chemical Engineering Formulate's 0%. MyPi. also leads on price (Free vs $4.99) and update cadence (every 2 months vs every 8 months). Chemical Engineering Formulate's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

MyPi. is free to download; Chemical Engineering Formulate costs $4.99 up front. Chemical Engineering Formulate sells 1 one-off in-app purchase and MyPi. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Chemical Engineering Formulate ships an update every 8 months, MyPi. every 2 months. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Chemical Engineering Formulate | MyPi. |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[4.2 (37 ratings)](https://appshunter.io/ios/app/mypi/id1098156642/reviews)** |
| Number of ratings | — | **37** |
| Positive reviews | 0.0% of reviews | **68.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 19 MB | 12 MB |
| Requires iOS | 18.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Kobi Snir](https://appshunter.io/developer/393343394) |

## What reviewers say

### Chemical Engineering Formulate

[App page](https://appshunter.io/ios/app/chemical-engineering-formulate/id354670363)

This comprehensive reference tool provides over 1,500 formulas, calculators, and conversion charts for chemical engineering professionals and students. It covers a wide range of topics including heat transfer, fluid mechanics, and reaction kinetics, with support for both US and Metric units.

**Highlights:** 1,500+ formulas and calculators, 700+ engineering calculators, US/Metric unit toggle, Dual-unit display, Searchable reference tables, Offline functionality, Save and share calculations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chemistry Pro | $3.99 | one-time |


### MyPi.

[App page](https://appshunter.io/ios/app/mypi/id1098156642)

Control your Raspberry Pi's GPIO pins remotely from your iPhone or iPad. Manage 8 output pins via the app or physical switches, perfect for home automation. Connect to multiple Raspberry Pis easily without needing IP addresses.

**Highlights:** Control 8 output pins, Input pin control via switches, Setup up to 4 Raspberry Pis, Email-based Pi connection, Home automation projects

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $19.99 | one-time |


## Frequently asked questions

### Is Chemical Engineering Formulate free?

Chemical Engineering Formulate costs $4.99, and also offers in-app purchases.

### Is MyPi. free?

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

### Do Chemical Engineering Formulate or MyPi. have ads?

MyPi. shows ads; Chemical Engineering Formulate does not.

### Which is updated more often, Chemical Engineering Formulate or MyPi.?

Chemical Engineering Formulate ships an update every 8 months, and MyPi. every 2 months. Most recently, Chemical Engineering Formulate was updated on October 18, 2026 and MyPi. 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.*