# Na Calculator

> Medical calculator for intravenous fluid rate and duration calculations. (iPhone/iPad app by Columbia Software Works, LLC.)

- Source: https://appshunter.io/ios/app/na-calculator/id421308156 (this page in markdown: same URL + `.md`)
- Developer: [Columbia Software Works, LLC](https://appshunter.io/developer/421308159)
- Category: Medical
- Price: $1.99
- Rating: 3.40/5 from 5 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 4.2 · 0 MB
- Languages: English
- Released: 2011-02-24
- Data updated: 2026-06-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/na-calculator/id421308156/reviews.md

## What is Na Calculator?

A medical calculator for use in determining the rate and duration of  intravenous (iv) fluids for treatment of hypernatremia and hyponatremia.  Fast, convenient and easy to use.  Allows user to specify correction rate, choose between various iv fluids, and choose between two different methods for calculating fluids, plus more.  Features shake to reset text fields for convenience.

## Key features

- IV fluid rate and duration calculation
- Hypernatremia and hyponatremia treatment
- Specify correction rate
- Choose between various IV fluids
- Two calculation methods
- Shake to reset text fields

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/na-calculator/id421308156/reviews.md

### 1/5 — Doesn't work

*2014-12-24*

FYI, app doesn't work, stuck in frozen mode

### 5/5 — Please update the app

*2014-11-13*

This app is actually fantastic however since the new iPhone operating system came out it will not work. I wouldn't buy the app unless you're still using the older version. Ol' Kevin Lease needs to update his app. Quit being lazy!

### 1/5 — Waste

*2014-10-27*

App doesn't work! It's just a screen shot.

### 5/5 — Great app

*2012-10-02*

I like it. User friendly.  Easy to use, well done!

### 5/5 — Works great

*2011-05-31*

Useful easy to use

## Frequently asked questions about Na Calculator

### What is Na Calculator used for?

Na Calculator is a medical utility designed to determine the rate and duration of intravenous (IV) fluids for treating hypernatremia and hyponatremia. It offers a fast, convenient, and easy-to-use interface for these critical calculations.

### What calculation methods does Na Calculator offer?

Na Calculator allows users to choose between two different methods for calculating IV fluids. This flexibility helps healthcare professionals select the approach best suited for their patient's specific needs.

### Can I customize the IV fluid calculations in Na Calculator?

Yes, Na Calculator enables users to specify the correction rate and choose between various IV fluids. This customization ensures accurate and tailored fluid management for patients.

### How does Na Calculator handle data entry?

Na Calculator features a convenient 'shake to reset' functionality for its text fields. This allows for quick clearing of entries, improving efficiency during use.

### What is the price of Na Calculator?

Na Calculator is a paid application, priced at $1.99. This one-time purchase grants access to its medical calculation features.

### What is the age rating for Na Calculator?

Na Calculator has an age rating of 4+. This indicates it is suitable for a wide range of users, though its primary audience is healthcare professionals.

### How often is Na Calculator updated?

Na Calculator was last updated on April 4, 2011, to version 1.2. Given its release date and last update, it may not receive frequent updates.

### What devices is Na Calculator available on?

Based on the provided data, Na Calculator is available on mobile devices. Specific operating system compatibility (iOS or Android) is not detailed but implied by its nature as a mobile application.

## Version history (last 1 release)

### 1.2 — 2011-04-04

Fixed bug with correction rate.

## More apps by Columbia Software Works, LLC

- [Pupil Sizer](https://appshunter.io/ios/app/pupil-sizer/id421530699)
- [Alternating Trail Making Test](https://appshunter.io/ios/app/alternating-trail-making-test/id422568138)
- [Clockface Test](https://appshunter.io/ios/app/clockface-test/id425976891)
- [Fibromyalgia Tender Points](https://appshunter.io/ios/app/fibromyalgia-tender-points/id427142208)
- [Lawn Defender](https://appshunter.io/ios/app/lawn-defender/id440092430)

All apps by Columbia Software Works, LLC: https://appshunter.io/developer/421308159

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*