Physical Constants vs xplooor
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).
xplooor
Identify objects around you using visual search and learn interesting facts about them. Save your discoveries in a personal scrapbook. This app encourages curiosity and exploration of your surroundings.
- Visual object identification
- Display up to 5 key facts per object
- Utilizes Google Vision AI
- Content sourced from Wikipedia
- Save searches to a scrapbook
- Encourages exploration and curiosity
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XPlooor is a discovery and learning app. You can use its visual search engine to identify objects around you. XPlooor will also help you to know more about these identified objects by showing up to 5 important facts about each. XPlooor uses best in class Visual search AI engine - Google vision to identify labels (objects, landmarks, people, etc.) from your pictures. Google Vision has been rated as the most accurate Image tagging AI with 87% accuracy. XPlooor uses content from Wikipedia world's largest crowd sourced learning library. XPlooor uses intelligent algorithm to parse through Wikipedia data to sort out the most valuable facts about any topic. You can also save your searches and create a library of scrapbook. Therefore XPlooor is a complete visual learning app that can engage you with your surrounding and get you started on a journey of discovery and knowledge. It will excite your curiosity and motivate you to constantly explore and learn from your surroundings. XPlooor can be used throughout the day and you go about your normal daily routine and learn about everyday objects. It is also a great companion for your travels where you see and explore new sights and locations.
Screenshots
Verdict
The clearest difference is rating: xplooor at 5.0 against Physical Constants's 3.3. xplooor also leads on ads (none vs shown) and update cadence (every 9 days vs every 9 months). Physical Constants's advantage is iOS requirement (12.0 vs 15.0). On price, ratings volume, 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.
xplooor holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively.
Physical Constants ships an update every 9 months, xplooor every 9 days. The most recent releases landed on October 30, 2026 and October 13, 2026 respectively.
| Parameter | Physical Constants | xplooor |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 3 | 3 |
| Update frequency | Every 9 months | Every 9 days — better |
| 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 — better | 15.0 |
| Further details — not scored | ||
| Size | 25 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Takuya Ishikawa | Pinal Naik |
Customer experience
Physical Constants
xplooor
In-app purchases
Physical Constants
No in-app purchases
xplooor
No in-app purchases
Questions
Is Physical Constants free?
Is xplooor free?
Which has better reviews, Physical Constants or xplooor?
Do Physical Constants or xplooor have ads?
Which is updated more often, Physical Constants or xplooor?
Other comparisons
