# Chemical Engineering Formulate vs Two Phase Separator Lite

The clearest difference is price: Two Phase Separator Lite at Free against Chemical Engineering Formulate's $4.99. Two Phase Separator Lite also leads on in-app purchases (none vs 1) and iOS requirement (11.0 vs 18.6). Chemical Engineering Formulate's advantage is update cadence (every 8 months vs every 35 months). On ads and device support there is nothing between them.

Two Phase Separator Lite is free to download; Chemical Engineering Formulate costs $4.99 up front. Chemical Engineering Formulate sells 1 one-off in-app purchase. Two Phase Separator Lite asks for nothing beyond the download.

Chemical Engineering Formulate ships an update every 8 months, Two Phase Separator Lite every 35 months. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Chemical Engineering Formulate | Two Phase Separator Lite |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 35 months |
| Monetization | Paid | — |
| Size | 19 MB | 27 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) | [Ali Pourahmadi Laleh](https://appshunter.io/developer/1218620381) |

## 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 |


### Two Phase Separator Lite

[App page](https://appshunter.io/ios/app/two-phase-separator-lite/id1347623045)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chemical Engineering Formulate free?

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

### Is Two Phase Separator Lite free?

Two Phase Separator Lite is free to download, with no in-app purchases.

### Do Chemical Engineering Formulate or Two Phase Separator Lite have ads?

Neither Chemical Engineering Formulate nor Two Phase Separator Lite shows ads.

### Which is updated more often, Chemical Engineering Formulate or Two Phase Separator Lite?

Chemical Engineering Formulate ships an update every 8 months, and Two Phase Separator Lite every 35 months. Most recently, Chemical Engineering Formulate was updated on October 18, 2026 and Two Phase Separator Lite on October 9, 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.*