# BaseBall Indicator BSO vs Rule

The clearest difference is in-app purchases: BaseBall Indicator BSO at none against Rule's 1. BaseBall Indicator BSO also leads on update cadence (weekly vs every 3 weeks). Rule's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Rule sells 1 in-app purchase, starting at $2.99 per month. BaseBall Indicator BSO asks for nothing beyond the download.

BaseBall Indicator BSO ships an update weekly, Rule every 3 weeks. The most recent releases landed on September 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | BaseBall Indicator BSO | Rule |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 4 MB | 45 MB |
| Requires iOS | 16.0 | **15.0.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daiki Ishimoto](https://appshunter.io/developer/1687054023) | [SEIICHI MIYAKO](https://appshunter.io/developer/6777005672) |

## What reviewers say

### BaseBall Indicator BSO

[App page](https://appshunter.io/ios/app/baseball-indicator-bso/id6737688673)

**In-app purchases:** none


### Rule

[App page](https://appshunter.io/ios/app/rule-base/id6777624808)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rule-Base Pro | $2.99 | per month |


## Frequently asked questions

### Is BaseBall Indicator BSO free?

BaseBall Indicator BSO is free to download, with no in-app purchases.

### Is Rule free?

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

### Do BaseBall Indicator BSO or Rule have ads?

Both BaseBall Indicator BSO and Rule show ads.

### Which is updated more often, BaseBall Indicator BSO or Rule?

BaseBall Indicator BSO ships an update weekly, and Rule every 3 weeks. Most recently, BaseBall Indicator BSO was updated on September 28, 2026 and Rule on October 6, 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.*