Comparison

Chemdata vs Thermit Lookup

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

Chemdata3 screens
Thermit Lookup4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences · 5 level
Chemdata versus Thermit Lookup: the parameters behind the verdict, then further details
ParameterChemdataThermit Lookup
PriceFreeFree
Positive reviews66.7% of reviews100.0% of reviews — better
Update frequencyEvery 19 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.07.0 — better
Further details — not scored
Size49 MB12 MB
Age rating12+4+
DeveloperRicardo-AEA ltdJonathon Matthews

Customer experience

Chemdata

Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Thermit Lookup

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Chemdata

No in-app purchases

None

Thermit Lookup

No in-app purchases

Questions

Is Chemdata free?
Chemdata is free to download, with no in-app purchases.
Is Thermit Lookup free?
Thermit Lookup is free to download, with no in-app purchases.
Do Chemdata or Thermit Lookup have ads?
Neither Chemdata nor Thermit Lookup shows ads.
Which is updated more often, Chemdata or Thermit Lookup?
Chemdata ships an update every 19 months, and Thermit Lookup every 3 months. Most recently, Chemdata was updated on October 21, 2026 and Thermit Lookup on October 29, 2026.

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