Comparison

EMD PTE vs Isotope Browser

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

Head to head
About

EMD PTE

This comprehensive mobile reference work provides detailed information on all chemical elements. It features a molar mass calculator, interactive visualizations, and offline access, making it an indispensable tool for students, educators, and chemistry enthusiasts.

Highlights
  • Detailed element information
  • Visualized element properties
  • Molar mass calculator
  • Offline access
  • Multi-language support
  • Element comparison function
Features
Read full description

The EMD PSE App is the ultimate tool for every friend of chemistry – whether pupil or teacher, university student or professor, amateur or expert, hobbyist or technician. Our app is the must-have of digital periodic tables. Get informed with our mobile reference work, any time, with ease, offline and in detail, in the usual straightforward, user-friendly way. Download now free of charge and start experimenting.  New features in the latest version: - Additional translations: Chinese (simplified), Portuguese, and Russian. - Users can now change the language directly in the app - New function for direct comparison of two elements - A separate keypad for the molar mass calculator makes formulas easier to enter - Headline and breadcrumbs added for improved orientation - Filtering option and optimized usability for the ranking list of properties - Update of element master data - Update to current operating system versions - Improved touch support for diagrams - Museum mode All existing features: - All important information about the elements: atomic number, valence electrons, oxidation state, electronegativity according to Allred-Rochow and Pauling, atomic mass, boiling point, melting point, atomic radius, density, history, discoverer, classification, crystalline structure type, electron configuration, ionization energy, isotopic composition, state of matter, hardness according to Mohs, basic state, oxidation numbers, percentage of mass in Earth’s crust, year of discovery, half-life, and much more. - Visualized element properties: atomic radius, atomic radius graphic, electronegativity (according to Allred-Rochow and Pauling), ionization energy, relative atomic mass, state of matter, ranking list of properties, discovery, classifications. - Molar mass calculator: simple entry field for chemical formulas. Calculate molar mass simply and quickly. - Offline use. No Internet needed. All contents in one app.  - Streamlined handling of access rights. - Interactive operation: smart operating elements and numerous selection options. - Variety of languages: German, English, French and Spanish.

About

Isotope Browser

Access comprehensive nuclear data for over 4,000 nuclides and isomers. Explore interactive charts, filter by various criteria, and view detailed information for each nuclide. Data is sourced from reliable resources and available offline.

Highlights
  • Properties of over 4,000 nuclides and isomers
  • Interactive Chart of Nuclides
  • Periodic Table of Elements
  • Filter by half-life, decay mode, radiation type, and energy
  • Detailed nuclide information with web links
  • Offline access to embedded database
Features
Read full description

Provided by the Nuclear Data Section of the International Atomic Energy Agency, the app gives properties of more than 4 000 nuclides and isomers. A Chart of Nuclides, with zooming and tapping enabled, and a Periodic Table of Elements are included to allow easy selection and navigation. Filter criteria on half-life, decay mode, radiation type and energy can be selected. Summary data are presented in a scrolling list, with a details page for each nuclide containing web links to the data sources and further information such as level and decay schema. The filtered nuclides can be visualised on the Chart of Nuclides. Data are taken from the most recent and reliable sources, and optimal search-and-retrieve performance is achieved with an embedded database, meaning that no network connection is required.

Screenshots

EMD PTE4 screens
Isotope Browser4 screens

Verdict

The call

The clearest difference is update cadence: Isotope Browser at every 6 weeks against EMD PTE's every 8 months. EMD PTE's advantage is ratings volume (124 vs 27). On price, rating, review sentiment and ads 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.

ReceptionRating · Positive reviews · Number of ratings

Isotope Browser holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 124 and 27 respectively. Written reviews complicate that: 90% of EMD PTE's written reviews are positive against 83% of Isotope Browser's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

EMD PTE ships an update every 8 months, Isotope Browser every 6 weeks. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
EMD PTE versus Isotope Browser: the parameters behind the verdict, then further details
ParameterEMD PTEIsotope Browser
PriceFreeFree
Rating4.6 (124 ratings)4.8 (27 ratings) — better
Positive reviews90.5% of reviews — better82.6% of reviews
Number of ratings124 — better27
Update frequencyEvery 8 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.011.0 — better
Further details — not scored
Size18 MB8 MB
Age rating4+4+
DeveloperMerck KGaA (Darmstadt, Germany)IAEA

Customer experience

EMD PTE

All ratings121 ratings
Positive90.9%
Neutral0.8%
Negative8.3%
Written reviews126 reviews
Positive90.5%
Neutral4.0%
Negative5.6%

Isotope Browser

All ratings27 ratings
Positive92.6%
Neutral3.7%
Negative3.7%
Written reviews23 reviews
Positive82.6%
Neutral13.0%
Negative4.3%

Bugs and requests

EMD PTE

Reported bugs

2 issues
  • Incorrect atomic radius data for some elements
  • Glitches when switching between screens

Requested features

4 requests
  • Add search functionality
  • Provide more customization options
  • Include isotope and mass data
  • Improve navigation between elements

Isotope Browser

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

EMD PTE

No in-app purchases

None

Isotope Browser

No in-app purchases

Questions

Is EMD PTE free?
EMD PTE is free to download, with no in-app purchases.
Is Isotope Browser free?
Isotope Browser is free to download, with no in-app purchases.
Which has better reviews, EMD PTE or Isotope Browser?
Isotope Browser is rated higher. EMD PTE averages 4.6 out of 5 from 124 ratings, while Isotope Browser averages 4.8 from 27 ratings.
Do EMD PTE or Isotope Browser have ads?
Neither EMD PTE nor Isotope Browser shows ads.
Which is updated more often, EMD PTE or Isotope Browser?
EMD PTE ships an update every 8 months, and Isotope Browser every 6 weeks. Most recently, EMD PTE was updated on October 21, 2026 and Isotope Browser on October 16, 2026.

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