# Chicago Shiloh SDA vs RTSDA

The clearest difference is update cadence: RTSDA at every 5 weeks against Chicago Shiloh SDA's every 27 months. Chicago Shiloh SDA's advantage is iOS requirement (13.0 vs 18.0). On price, ads, 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.

Chicago Shiloh SDA ships an update every 27 months, RTSDA every 5 weeks. Both last shipped on October 27, 2026.

## The numbers

| Metric | Chicago Shiloh SDA | RTSDA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 5 weeks** |
| Size | 42 MB | 11 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Chicago Shiloh SDA=](https://appshunter.io/developer/1741595355) | [Benjamin Slingo](https://appshunter.io/developer/1781343358) |

## What reviewers say

### Chicago Shiloh SDA

[App page](https://appshunter.io/ios/app/chicago-shiloh-sda/id6498233832)

**Features:** macOS Compatibility

**In-app purchases:** none


### RTSDA

[App page](https://appshunter.io/ios/app/rtsda/id6738595657)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Chicago Shiloh SDA free?

Chicago Shiloh SDA is free to download, with no in-app purchases.

### Is RTSDA free?

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

### Do Chicago Shiloh SDA or RTSDA have ads?

Neither Chicago Shiloh SDA nor RTSDA shows ads.

### Which is updated more often, Chicago Shiloh SDA or RTSDA?

Chicago Shiloh SDA ships an update every 27 months, and RTSDA every 5 weeks. Most recently, Chicago Shiloh SDA was updated on October 27, 2026 and RTSDA on October 27, 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.*