# iTIVA Anesthesia Plus vs ABG Calculator

The clearest difference is price: iTIVA Anesthesia Plus at Free against ABG Calculator's $9.99. iTIVA Anesthesia Plus also leads on ratings volume (345 vs 2). ABG Calculator's advantage is in-app purchases (none vs 2) and review sentiment (100% vs 73%). On update cadence, ads, device support and iOS requirement there is nothing between them.

iTIVA Anesthesia Plus is free to download; ABG Calculator costs $9.99 up front. iTIVA Anesthesia Plus sells 2 in-app purchases, starting at $9.99 per year. ABG Calculator asks for nothing beyond the download.

ABG Calculator holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: iTIVA Anesthesia Plus has 345 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of iTIVA Anesthesia Plus's written reviews are positive against 100% of ABG Calculator's.

iTIVA Anesthesia Plus ships an update every 2 months, ABG Calculator every 3 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | iTIVA Anesthesia Plus | ABG Calculator |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.8 (345 ratings)](https://appshunter.io/ios/app/itiva-anesthesia-plus/id1442975682/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/abg-calculator/id6743676456/reviews)** |
| Number of ratings | **345** | 2 |
| Positive reviews | 72.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Subscription | **Paid** |
| Size | 125 MB | 8 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ANESTESIARTE CALI SAS](https://appshunter.io/developer/782878902) | [SAGA Virtual Tecnologia Ltda](https://appshunter.io/developer/1455930511) |

## What reviewers say

### iTIVA Anesthesia Plus

[App page](https://appshunter.io/ios/app/itiva-anesthesia-plus/id1442975682)

This app simulates drug concentrations in plasma and optimizes infusion schemes for medical professionals. It offers a comprehensive drug library, target-controlled infusion simulation, and MAC age calculation. Users can explore drug interactions, share cases, and export data.

**Highlights:** Accurate drug concentration estimation, Target Controlled Infusion (TCI) simulation, Comprehensive drug library (28 drugs), Explore drug interactions (70 PK, 10 PD models), MAC Age Calculation, Intraoperative milestones & case sharing, Save and run multiple simulations, Excel data export

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iTIVA yearly | $9.99 | per year |
| iTIVA yearly 2021 | $9.99 | per year |


### ABG Calculator

[App page](https://appshunter.io/ios/app/abg-calculator/id6743676456)

This medical tool quickly analyzes arterial blood gas results for healthcare professionals. It calculates acid-base status, anion gap, and compensation, offering comprehensive diagnoses offline. Save and share patient results for efficient clinical decision-making.

**Highlights:** Offline arterial blood gas analysis, Instant acid-base disorder determination, Anion gap and compensation assessment, Flexible unit options, Save and share patient results, Results history and search

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

**In-app purchases:** none


## Frequently asked questions

### Is iTIVA Anesthesia Plus free?

iTIVA Anesthesia Plus is free to download, with in-app purchases available.

### Is ABG Calculator free?

ABG Calculator costs $9.99, with no in-app purchases.

### Which has better reviews, iTIVA Anesthesia Plus or ABG Calculator?

ABG Calculator is rated higher. iTIVA Anesthesia Plus averages 4.8 out of 5 from 345 ratings, while ABG Calculator averages 5.0 from 2 ratings.

### Do iTIVA Anesthesia Plus or ABG Calculator have ads?

Neither iTIVA Anesthesia Plus nor ABG Calculator shows ads.

### Which is updated more often, iTIVA Anesthesia Plus or ABG Calculator?

iTIVA Anesthesia Plus ships an update every 2 months, and ABG Calculator every 3 months. Most recently, iTIVA Anesthesia Plus was updated on November 2, 2026 and ABG Calculator on November 4, 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.*