# QABA vs S

QABA and S are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | QABA | S |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/qaba/id872471322/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | — |
| Monetization | Free | — |
| Size | 5 MB | 42 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Calum Donald](https://appshunter.io/developer/872471325) | [Stanford University](https://appshunter.io/developer/292922032) |

## What reviewers say

### QABA

[App page](https://appshunter.io/ios/app/qaba/id872471322)

This medical app provides quantitative acid-base analysis by allowing users to input blood results. It calculates key variables like Strong Ion Difference and Net Unmeasured Ions, offering a color-coded results screen and a user guide. It's designed for medical professionals to aid in clinical decision-making.

**Highlights:** Quantitative Acid Base Analysis, Blood result input, Calculates SID, NUI, Atot, Color-coded results screen, Includes User Guide, Supports additional lab values

**Features:** macOS Compatibility

**In-app purchases:** none


### S

[App page](https://appshunter.io/ios/app/s-smart/id1482338902)

**In-app purchases:** none


## Frequently asked questions

### Is QABA free?

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

### Is S free?

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

### Do QABA or S have ads?

Neither QABA nor S 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.*