# iNSIGHT Stereograms vs Physical Constants

The clearest difference is price: Physical Constants at Free against iNSIGHT Stereograms's $2.99. Physical Constants also leads on update cadence (every 9 months vs every 38 months) and device support (3 vs 1). iNSIGHT Stereograms's advantage is ads (none vs shown). On in-app purchases there is nothing between them.

Physical Constants is free to download; iNSIGHT Stereograms costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iNSIGHT Stereograms ships an update every 38 months, Physical Constants every 9 months. Both last shipped on October 14, 2026.

## The numbers

| Metric | iNSIGHT Stereograms | Physical Constants |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[3.3 (3 ratings)](https://appshunter.io/ios/app/physical-constants-ml/id837679891/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 38 months | **Every 9 months** |
| Monetization | — | Ad-supported |
| Size | 112 MB | 25 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Polyhedron Learning Media, Inc.](https://appshunter.io/developer/458882328) | [Takuya Ishikawa](https://appshunter.io/developer/468311118) |

## What reviewers say

### iNSIGHT Stereograms

[App page](https://appshunter.io/ios/app/insight-stereograms/id602305404)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is iNSIGHT Stereograms free?

iNSIGHT Stereograms costs $2.99, with no in-app purchases.

### Is Physical Constants free?

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

### Do iNSIGHT Stereograms or Physical Constants have ads?

Physical Constants shows ads; iNSIGHT Stereograms does not.

### Which is updated more often, iNSIGHT Stereograms or Physical Constants?

iNSIGHT Stereograms ships an update every 38 months, and Physical Constants every 9 months. Most recently, iNSIGHT Stereograms was updated on October 14, 2026 and Physical Constants on October 14, 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.*