# Chemical Engineering Formulate vs Chatbot Assistant

The clearest difference is review sentiment: Chatbot Assistant at 83% against Chemical Engineering Formulate's 0%. Chatbot Assistant also leads on price (Free vs $4.99) and update cadence (every 9 days vs every 8 months). On ads, in-app purchases and device support there is nothing between them.

Chatbot Assistant is free to download; Chemical Engineering Formulate costs $4.99 up front. Chemical Engineering Formulate sells 1 one-off in-app purchase and Chatbot Assistant sells 4 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Chemical Engineering Formulate ships an update every 8 months, Chatbot Assistant every 9 days. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Chemical Engineering Formulate | Chatbot Assistant |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[4.7 (224 ratings)](https://appshunter.io/ios/app/chatbot-assistant-genesis-ai/id6670447214/reviews)** |
| Number of ratings | — | **224** |
| Positive reviews | 0.0% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 9 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 19 MB | 58 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Devin Morgan](https://appshunter.io/developer/1735442803) |

## 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 |


### Chatbot Assistant

[App page](https://appshunter.io/ios/app/chatbot-assistant-genesis-ai/id6670447214)

This AI chatbot app offers a versatile experience powered by advanced models like GPT-5 and Gemini. It helps with creative writing, homework, image generation, web analysis, and role-playing. Specialized assistants and file/link insights further enhance productivity and simplify daily tasks.

**Highlights:** Multiple advanced AI models (GPT-5, Gemini, Claude), Image generation from text prompts, Web chat for real-time information, Homework and creative writing assistance, Role-playing adventures, Speech-to-text functionality, File and link analysis

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 1 Week | $5.99 | per 7 days |
| Pro 1 Week | $5.99 | per 7 days |
| Pro 1 Month | $17.99 | per month |
| Pro 1 Year | $49.99 | per year |


## Frequently asked questions

### Is Chemical Engineering Formulate free?

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

### Is Chatbot Assistant free?

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

### Do Chemical Engineering Formulate or Chatbot Assistant have ads?

Neither Chemical Engineering Formulate nor Chatbot Assistant shows ads.

### Which is updated more often, Chemical Engineering Formulate or Chatbot Assistant?

Chemical Engineering Formulate ships an update every 8 months, and Chatbot Assistant every 9 days. Most recently, Chemical Engineering Formulate was updated on October 23, 2026 and Chatbot Assistant on October 22, 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.*