Physical Constants vs Protein Guide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Physical Constants
Access a comprehensive list of physical constants, organized by category for easy searching. This app supports all AppStore languages and allows users to report corrections via email.
- Physical constants database
- Categorized by topic
- Search functionality
- Multi-language support
- User feedback for corrections
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Application that displays the physical constants. Classified by category, easy to search. Supports all languages in the AppStore. If you find something to be corrected, please send an E-mail (English or Japanese).
Protein Guide
Explore the intricate stages of protein structure with detailed diagrams, explanations, and animations. This app serves as a valuable reference for both beginners and experienced individuals, offering insights into unique properties and biological functions.
- Detailed diagrams of protein structure
- Explanations of protein stages
- Animations of protein structures
- Information on unique properties and functions
- Example proteins demonstrating structural aspects
- ClassKit integration for teachers
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Learn about each stage of a proteins structure with detailed diagrams and explanations. This is a great experience if you are just starting out and need to learn about proteins, or if you have lots of experience and want a handy reference with you wherever you go. Protein Guide has a great selection of example proteins to look at, with each demonstrating an aspect of protein structure. There is also more detailed info about the protein, describing unique properties, as well as its function in biological systems. There is also an animation of the proteins' itself to highlight its unique structure. Protein Guide takes advantage of the full iPad canvas. It also supports multitasking, with slide-over and split-view (requires iPad Air 2 and later). This means you can have your protein examples up, while reading or taking notes. Teachers can assign things to read for students in Protein Guide easily with ClassKit.
Screenshots
Verdict
The clearest difference is rating: Protein Guide at 4.8 against Physical Constants's 3.3. Protein Guide also leads on ads (none vs shown) and review sentiment (50% vs 33%). On price, update cadence, in-app purchases and device support 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.
Protein Guide holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: Protein Guide has 45 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of Physical Constants's written reviews are positive against 50% of Protein Guide's.
Both ship on a similar rhythm, roughly every 9 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | Physical Constants | Protein Guide |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) | 4.8 (45 ratings) — better |
| Positive reviews | 33.3% of reviews | 50.0% of reviews — better |
| Number of ratings | 3 | 45 — better |
| Update frequency | Every 9 months | Every 9 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 224 MB |
| Age rating | 4+ | 4+ |
| Developer | Takuya Ishikawa | Axton Pitt |
Customer experience
Physical Constants
Protein Guide
In-app purchases
Physical Constants
No in-app purchases
Protein Guide
No in-app purchases
Questions
Is Physical Constants free?
Is Protein Guide free?
Which has better reviews, Physical Constants or Protein Guide?
Do Physical Constants or Protein Guide have ads?
Which is updated more often, Physical Constants or Protein Guide?
Other comparisons
