# Physical Constants vs xplooor

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.

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.

## The numbers

| Metric | Physical Constants | xplooor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/physical-constants-ml/id837679891/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/xplooor/id1440252598/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 9 days** |
| Monetization | Ad-supported | **Free** |
| Size | 25 MB | 7 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Ishikawa](https://appshunter.io/developer/468311118) | [Pinal Naik](https://appshunter.io/developer/1259820545) |

## What reviewers say

### Physical Constants

[App page](https://appshunter.io/ios/app/physical-constants-ml/id837679891)

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.

**Highlights:** Physical constants database, Categorized by topic, Search functionality, Multi-language support, User feedback for corrections

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### xplooor

[App page](https://appshunter.io/ios/app/xplooor/id1440252598)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is Physical Constants free?

Physical Constants is free to download, with no in-app purchases.

### Is xplooor free?

xplooor is free to download, with no in-app purchases.

### Which has better reviews, Physical Constants or xplooor?

xplooor is rated higher. Physical Constants averages 3.3 out of 5 from 3 ratings, while xplooor averages 5.0 from 3 ratings.

### Do Physical Constants or xplooor have ads?

Physical Constants shows ads; xplooor does not.

### Which is updated more often, Physical Constants or xplooor?

Physical Constants ships an update every 9 months, and xplooor every 9 days. Most recently, Physical Constants was updated on October 30, 2026 and xplooor on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*