# Chemdata vs FAST

The clearest difference is review sentiment: Chemdata at 67% against FAST's 0%. FAST's advantage is update cadence (every 7 months vs every 19 months) and iOS requirement (12.1 vs 14.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Chemdata ships an update every 19 months, FAST every 7 months. The most recent releases landed on October 4, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Chemdata | FAST |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/fast-act/id1446010360/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 7 months** |
| Monetization | Free | Free |
| Size | 49 MB | 22 MB |
| Requires iOS | 14.0 | **12.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Ricardo-AEA ltd](https://appshunter.io/developer/691094634) | [Timilon Technology Acquisitions LLC](https://appshunter.io/developer/1446010359) |

## What reviewers say

### Chemdata

[App page](https://appshunter.io/ios/app/chemdata/id849758854)

Access a comprehensive chemical hazard database offline for incident management. Provides detailed information on over 62,000 chemicals, including safety, transport, and emergency response guidance. Offers multilingual support and regular updates.

**Highlights:** Offline chemical database access, Hazardous chemical identification, Incident command support, Transport classification, Personal Protective Equipment (PPE) guidance, Multilingual support (EN, NL, FR, DE, ES)

**Features:** macOS Compatibility

**In-app purchases:** none


### FAST

[App page](https://appshunter.io/ios/app/fast-act/id1446010360)

This app serves as a guide for HAZMAT professionals on how a specific decontamination agent interacts with and neutralizes various chemicals. It features a comprehensive chemical threat index, detailing efficacy on vapor releases and contaminated surfaces, with search and sort functionalities.

**Highlights:** Extensive chemical threat index, FAST-ACT efficacy details, Vapor release decontamination, Contaminated surface decontamination, Search by Chemical Name, Sort by CAS Number

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chemdata free?

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

### Is FAST free?

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

### Do Chemdata or FAST have ads?

Neither Chemdata nor FAST shows ads.

### Which is updated more often, Chemdata or FAST?

Chemdata ships an update every 19 months, and FAST every 7 months. Most recently, Chemdata was updated on October 4, 2026 and FAST on September 17, 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.*