Chemdata vs Thermit Lookup
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chemdata
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.
- Offline chemical database access
- Hazardous chemical identification
- Incident command support
- Transport classification
- Personal Protective Equipment (PPE) guidance
- Multilingual support (EN, NL, FR, DE, ES)
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If your organisation handles chemicals and you need to know how to manage their risks, Pocket Chemdata® is simply a 'must have'. Pocket Chemdata is a reliable, interactive database subscription service providing access to over 62,000 documents and more than 186,000 different chemical names including pure and trade-name chemicals. Pocket Chemdata provides clear information including how to manage their hazardous affects. PRODUCT BENEFITS: •Simple and easy-to-use chemical and chemical hazard identification •Incident commanders can access chemical information from anywhere in the world (no internet connection required) •Helps to mitigate the consequences of incidents •Regularly updated database, so users always have the latest information •Information is installed on the device, so an internet connection is not required to access data •Provides the same clear concise advice as the standard Chemdata® FEATURES: •Powerful search functionality for efficient chemical identification •UN number, ADR HIN, EAC codes •Personal Protective Equipment (PPE) requirements •Physical form information •Transport classification •Chemical hazard information (only available to subscribers) •Reactivity guidance (only available to subscribers) •Fire, decontamination and first aid advice (only available to subscribers) •Precautions information including large and small spill advice (only available to subscribers) •Environmental data (only available to subscribers) •Physical properties (only available to subscribers) •Add private notes and comments against chemical records (only available to subscribers) •Sync private notes and comments with your organisation’s central Chemdata solution (only available to subscribers) Designed and continuously maintained by emergency responders from Ricardo's NCEC, one of the world's leading chemical emergency centres, Pocket Chemdata is one of the most trusted sources of chemical information available. Data is updated approximately twice a year to ensure responders have access to up-to-date information. Pocket Chemdata is used globally by organisations, including fire and other emergency services, to provide invaluable and timely advice in the event of chemical spillages, fires and contamination incidents. Trust Pocket Chemdata for clear and concise information on more than 62,000 substances, at your fingertips. The free app provides access to one full record, to demonstrate the full capabilities of the system, this can be found by searching for the ‘Chlorine’ record or document number 5. LANGUAGES As well as English, Pocket Chemdata includes Dutch, French, German and Spanish translations - all in the one app. SUPPORT We would really like to know what you think about Pocket Chemdata, so please visit www.chemdata.co.uk to provide feedback or ask questions. Alternatively, you can email us at chemdata@ricardo.com. Chemdata® and Pocket Chemdata® have been developed for NCEC by Ark Software Ltd and Payot Ltd.
Thermit Lookup
This app serves as a quick reference for thermit welders and planners. It provides essential parameters and timings for alumina-thermic welding processes based on selected rail sections, grades, welding processes, and fuel gases. It also offers direct links for ordering supplies and technical support.
- Select rail section, grade, process, and fuel gas
- Displays key welding parameters
- Provides process timings
- Links to company website for orders
- Includes Head Office telephone number
- Automatic database syncing
- Offline functionality
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The Thermit Lookup app provides Thermit Welders and planners with an “Aide Memoir” for the key parameters and timings for alumina-thermic welding processes based on user selected Rail Section, Rail Grade, Welding Process and Fuel Gas. The user makes a selection from the options provided in the pop-up menus based on the matrix of welding processes approved for rail welding. Selections are made based on the rail section and grade of steel being welded, the welding process being used (if appropriate for the selected rail section and grade) and fuel gas being used. Full details of the key welding parameters such as gas pressures, consumables, process timings and equipment are displayed as a list for the welder. Additionally, links are provided to our company web site and Head Office telephone so that consumables and equipment can be ordered or technical enquires related to welding issues can be dealt with. The database used for both the selection process and the results is automatically synced from the internet every time the app is opened to make sure that you always have the very latest set of data. If you have no internet connection at the time, the app simply uses the last downloaded database so you are still able to use the app fully in a no signal area. Please contact Thermit Welding GB Ltd for any problems you encounter whilst using the app or if you notice that any of the contained data is inaccurate for your territory.
Screenshots
Verdict
The clearest difference is review sentiment: Thermit Lookup at 100% against Chemdata's 67%. Thermit Lookup also leads on update cadence (every 3 months vs every 19 months) and iOS requirement (7.0 vs 14.0). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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, Thermit Lookup every 3 months. The most recent releases landed on October 21, 2026 and October 29, 2026 respectively.
| Parameter | Chemdata | Thermit Lookup |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Update frequency | Every 19 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 | 7.0 — better |
| Further details — not scored | ||
| Size | 49 MB | 12 MB |
| Age rating | 12+ | 4+ |
| Developer | Ricardo-AEA ltd | Jonathon Matthews |
Customer experience
Chemdata
Thermit Lookup
In-app purchases
Chemdata
No in-app purchases
Thermit Lookup
No in-app purchases








