# Principle vs Stock Backtest

The clearest difference is in-app purchases: Stock Backtest at none against Principle's 4. Principle's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Principle sells 4 one-off in-app purchases. Stock Backtest asks for nothing beyond the download.

## The numbers

| Metric | Principle | Stock Backtest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | — |
| Size | 49 MB | 25 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [주식회사 유자](https://appshunter.io/developer/1851710513) | [Younghwi Kim](https://appshunter.io/developer/1810888279) |

## What reviewers say

### Principle

[App page](https://appshunter.io/ios/app/principle-stock-backtest-sim/id6776831023)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Tokens | $1.99 | one-time |
| 33 Tokens | $4.99 | one-time |
| 115 Tokens | $14.99 | one-time |
| 600 Tokens | $59.99 | one-time |


### Stock Backtest

[App page](https://appshunter.io/ios/app/stock-backtest-backtestlab/id6806941718)

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

**In-app purchases:** none


## Frequently asked questions

### Is Principle free?

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

### Is Stock Backtest free?

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

### Do Principle or Stock Backtest have ads?

Both Principle and Stock Backtest show 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.*