# I.S. 584 vs B.R.A.H.M.S PCT

The clearest difference is update cadence: B.R.A.H.M.S PCT at every 2 weeks against I.S. 584's every 2 months. 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.

I.S. 584 ships an update every 2 months, B.R.A.H.M.S PCT every 2 weeks. The most recent releases landed on October 30, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | I.S. 584 | B.R.A.H.M.S PCT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 163 MB | 14 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Solved Education Consultancy, LLC](https://appshunter.io/developer/1506645558) | [Thermo Fisher Scientific](https://appshunter.io/developer/407517076) |

## What reviewers say

### I.S. 584

[App page](https://appshunter.io/ios/app/is-584/id1613989382)

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

**In-app purchases:** none


### B.R.A.H.M.S PCT

[App page](https://appshunter.io/ios/app/brahms-pct/id6736373690)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is I.S. 584 free?

I.S. 584 is free to download, with no in-app purchases.

### Is B.R.A.H.M.S PCT free?

B.R.A.H.M.S PCT is free to download, with no in-app purchases.

### Do I.S. 584 or B.R.A.H.M.S PCT have ads?

Neither I.S. 584 nor B.R.A.H.M.S PCT shows ads.

### Which is updated more often, I.S. 584 or B.R.A.H.M.S PCT?

I.S. 584 ships an update every 2 months, and B.R.A.H.M.S PCT every 2 weeks. Most recently, I.S. 584 was updated on October 30, 2026 and B.R.A.H.M.S PCT on October 17, 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.*