# ABG Expert vs ABGs NOW! Lite

The clearest difference is review sentiment: ABG Expert at 100% against ABGs NOW! Lite's 0%. ABG Expert also leads on rating (4.8 vs 3.2) and ads (none vs shown). ABGs NOW! Lite's advantage is update cadence (every 2 months vs every 5 months). On price, ratings volume, 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.

ABG Expert holds the better App Store score, 4.8 against 3.2. Both are backed by a comparable volume of ratings — 9 and 5 respectively. Written reviews point the same way: 100% of ABG Expert's written reviews are positive against 0% of ABGs NOW! Lite's.

ABG Expert ships an update every 5 months, ABGs NOW! Lite every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ABG Expert | ABGs NOW! Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/abg-expert/id885575488/reviews)** | [3.2 (5 ratings)](https://appshunter.io/ios/app/abgs-now-lite/id1497090235/reviews) |
| Number of ratings | **9** | 5 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 2 MB | 94 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Brian Dale Vander Werf MD Inc](https://appshunter.io/developer/1521935908) | [Bytewise Studios, LLC](https://appshunter.io/developer/1496483402) |

## What reviewers say

### ABG Expert

[App page](https://appshunter.io/ios/app/abg-expert/id885575488)

This medical tool provides accurate and flexible acid-base analysis for healthcare professionals. It offers detailed explanations, customizable ranges, and advanced features like anion gap correction and A-a gradient adjustments for various patient conditions and locations.

**Highlights:** Validated accuracy with real-world testing, Plausibility checks for physiologically impossible data, Automatic anion gap correction with albumin, Detailed explanations with equations, Separate or combined analysis of ABG, anion gap, A-a gradient, Customizable normal ranges for anion gap and delta gap, Age and barometric pressure adjustments for A-a gradient, Support for SI and non-SI units, Color-coded results and differential diagnoses, Adjustments for chronic respiratory conditions

**Features:** macOS Compatibility

**In-app purchases:** none


### ABGs NOW! Lite

[App page](https://appshunter.io/ios/app/abgs-now-lite/id1497090235)

Master arterial blood gas interpretation with this engaging medical app. It offers a calculator for quick answers, practice modes with hints, and a challenge mode to test your skills. Detailed analysis is provided for any incorrect interpretations.

**Highlights:** ABG Calculator, Practice Mode with Hints, Challenge Mode, Detailed Analysis, Knowledge Strengthening

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ABG Expert free?

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

### Is ABGs NOW! Lite free?

ABGs NOW! Lite is free to download, with no in-app purchases.

### Which has better reviews, ABG Expert or ABGs NOW! Lite?

ABG Expert is rated higher. ABG Expert averages 4.8 out of 5 from 9 ratings, while ABGs NOW! Lite averages 3.2 from 5 ratings.

### Do ABG Expert or ABGs NOW! Lite have ads?

ABGs NOW! Lite shows ads; ABG Expert does not.

### Which is updated more often, ABG Expert or ABGs NOW! Lite?

ABG Expert ships an update every 5 months, and ABGs NOW! Lite every 2 months. Most recently, ABG Expert was updated on November 1, 2026 and ABGs NOW! Lite on November 3, 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.*