EMD PTE vs BookWidgets
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Detailed element information
- Visualized element properties
- Molar mass calculator
- Offline access
- Multi-language support
- Element comparison function
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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.
BookWidgets
Easily create interactive lessons, quizzes, and games for students on iPads and iPhones. Share engaging activities privately or embed them in learning platforms. Track student progress with built-in analytics.
- Create worksheets, quizzes, games, maps, and timelines
- Add custom text, images, and questions
- Share activities via private links or LMS embedding
- Works on any device
- Track learner activity and grade student work
- Integrates with other educational apps
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Create engaging exercises for iPads and iPhones in minutes: Worksheets, Games, Quizzes, Maps, Timelines, and much more. Easily share a wide variety of beautiful and fun activities with your classroom, even if you're not a tech wizard. Choose from a broad range of activity types, and add your own text, images, questions and imagination. Your “widget” can be shared privately with a simple link, or embedded in any learning management system, and works on any device. BookWidgets is great for blended learning, flipped classrooms, as well as more traditional classrooms. Our analytics can track learner activity, so teachers can easily review and grade student work. BookWidgets works seamlessly with other educational apps like Showbie, iTunes U, iBooks Author, Explain Everything, Book Creator and many others. -------- “With BookWidgets, teachers don't have to force the kids to work on their exercises. They can fill in gaps and practice lessons as many times as they wish. This makes good students better and average students achieve levels they hadn't even aspired to before.” - Brian Dawson, 1:1 iPad Coordinator “If you aren't using BookWidgets in your 1:1 classroom, you are missing out on one of the best educational tools available.” - Harry Dickens, Instructional Technology Consultant “Using BookWidgets is just brilliant, I'm only limited by my own creativity now.” - Frans Ittmann, Apple Distinguished Educator “My pupils were cheering in class today, because they got BookWidgets for homework. Feeling motivated!“ - Martin Ringenaldus, Language teacher
Screenshots
Verdict
The clearest difference is review sentiment: EMD PTE at 90% against BookWidgets's 21%. EMD PTE also leads on rating (4.7 vs 1.7) and ratings volume (121 vs 30). BookWidgets's advantage is update cadence (monthly vs every 8 months) and iOS requirement (8.0 vs 12.0). 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.
EMD PTE holds the better App Store score, 4.7 against 1.7. Both are backed by a comparable volume of ratings — 121 and 30 respectively. Written reviews point the same way: 90% of EMD PTE's written reviews are positive against 21% of BookWidgets's.
EMD PTE ships an update every 8 months, BookWidgets monthly. The most recent releases landed on October 5, 2026 and October 14, 2026 respectively.
| Parameter | EMD PTE | BookWidgets |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (121 ratings) — better | 1.7 (30 ratings) |
| Positive reviews | 90.5% of reviews — better | 21.1% of reviews |
| Number of ratings | 121 — better | 30 |
| Update frequency | Every 8 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Merck KGaA (Darmstadt, Germany) | Kidimedia |
Customer experience
EMD PTE
BookWidgets
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
BookWidgets
Not enough reviews yet to summarise bugs or requests.
In-app purchases
EMD PTE
No in-app purchases
BookWidgets
No in-app purchases
Questions
Is EMD PTE free?
Is BookWidgets free?
Which has better reviews, EMD PTE or BookWidgets?
Do EMD PTE or BookWidgets have ads?
Which is updated more often, EMD PTE or BookWidgets?
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