# equivalence principle vs GT Graph

The clearest difference is in-app purchases: equivalence principle at none against GT Graph's 1. equivalence principle also leads on iOS requirement (16.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. GT Graph sells 1 one-off in-app purchase. equivalence principle asks for nothing beyond the download.

## The numbers

| Metric | equivalence principle | GT Graph |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 8 days |
| Size | 0 MB | 1 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Gennaro Eduardo Tangari](https://appshunter.io/developer/1616502345) |

## What reviewers say

### equivalence principle

[App page](https://appshunter.io/ios/app/equivalence-principle/id6670335382)

**Features:** macOS Compatibility

**In-app purchases:** none


### GT Graph

[App page](https://appshunter.io/ios/app/gt-graph/id6757393417)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GT Graph In-App Purchase | $0.99 | one-time |


## Frequently asked questions

### Is equivalence principle free?

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

### Is GT Graph free?

GT Graph is free to download, with in-app purchases available.

### Do equivalence principle or GT Graph have ads?

Neither equivalence principle nor GT Graph shows ads.

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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.*