Added optional PaO₂ input with oxygenation status in results. Expanded educational explanations for ABG interpretation. Minor UI refinements.

Thank you for using Acid Plus!
- fixed picker for smaller screen sizes

We continue to make other minor bug improvements

Thank you for using Acid Plus!
- added ability to choose light or dark mode within the app
- improved appearance of the picker

We continue to make other minor bug improvements

Please feel to reach out with feature requests or bug reports.

Thank you for using Acid Plus

We continue to make minor bug improvements to get the Lifetime upgrade available to our valued users
Please feel to reach out with feature requests or bug reports.

Thank you for using Acid Plus!

This version includes minor bug fixes

- Tired of subscriptions? After testing Acid Plus for a month for free, you can now *unlock Acid Plus for life* with a one-time purchase.
- Bug fixes and improvements

Bug fixes and minor improvements

- Fixed a bug with the wrong column of the dial responding when entering ABG data

New in Version 3:
- Completely redesigned look and feel
- Interactive graph
- Detailed results at your fingertips
- On-the-fly derivation of anion gap, delta-delta, and base excess
- Even more accurate calculator
- Easy sharing of interesting ABGs
- Steps allows you to view how a result was derived

- Updated for iOS 15 compatibility
- Bug fixes and minor improvements

New in Version 3:
- Completely redesigned look and feel
- Interactive graph
- Detailed results at your fingertips
- On-the-fly derivation of anion gap, delta-delta, and base excess
- Even more accurate calculator
- Easy sharing of interesting ABGs
- Steps allows you to view how a result was derived

Bug fixes and minor improvements

New in Version 3:
- Completely redesigned look and feel
- Interactive graph
- Detailed results at your fingertips
- On-the-fly derivation of anion gap, delta-delta, and base excess
- Even more accurate calculator
- Easy sharing of interesting ABGs
- Steps allows you to view how a result was derived

New in Version 3:
- Completely redesigned look and feel
- Interactive graph
- Detailed results at your fingertips
- Even more accurate calculator
- Easy sharing of interesting ABGs
- Steps allows you to view how a result was derived

Completely rebuilt from bottom up.   The calculator is better than ever and able to handle more unusual acid base problems.  A much better interface.

• In honor of our anesthesia colleagues, Acid Plus now gives you the option of displaying Base Excess

 - Base Excess adds another layer of interpretive nuance by allowing a quick check of how severe an acid-base disturbance is

 - Base Excess display is off by default, so head to the preference page to turn it on when desired

• Support emails now automatically include your most recent ABG values and device info to help with troubleshooting (optional)

• First time users will receive a reminder hint to rotate the device left or right to see the graph view

• Typo corrections

• Now iPhone OS 2.2 & 3.0 compatible
• Improved discrimination of secondary anion gap metabolic acidosis in the setting of acute and chronic respiratory alkalosis