INR log app

A New Zealand app that lets you keep track of your warfarin dose and INR results.

INR log app	By HealthObs Ltd
	Features Medication reminders. INR blood test reminders. Graphs and reports. New Zealand app.
Country of origin	New Zealand
Clinical review	Read a clinical review below.
Security and privacy	Does the app: Collect medical information? Yes Require a login? No Have password protection? No Have a privacy policy? Yes Require internet access to use? Yes Read more about safety and security when using apps. Brochures: Tips to improve your privacy and security [PDF, 65 KB] Healthify He Puna Waiora, NZ Staying safe online(external link) Netsafe, NZ
Cost	Free
Advertisements	This app contains no ads.
How to get the app	(external link)

The INR log app is a New Zealand app that lets you and your carers track and manage your warfarin dose and INR results. You're required to set your therapeutic INR range (upper and lower limit), select the tablets you use (brand and strength) and record your test results (date done and INR result).

To help you identify the warfarin tablets you're taking, the app has images of the different brands (Marevan or Coumadin) and strengths. You can set daily medication reminders and reminders for when your next test is due.

You can see your INR results displayed in a graph or table format and share them with your healthcare provider.

The Resources section allows you to add or delete results and to add previous results. This section also has the flexibility to allow you to adjust your treatment range and warfarin tablets if needed.

There's also a link to the INR log Facebook page which contains educational content. For the complete app description, go to the App Store(external link) or, for a more detailed review, see reviews below.

PROS	CONS
✔ Simple and easy to use. ✔ Optional reminders to take warfarin and arrange blood tests on time. ✔ Displays blood results on a graph so trends can be monitored. ✔ Images of the tablets can help patients/carers to take the right dose and be familiar with their warfarin tablets. ✔ Prepares a clear printable report to share results with nominated GP via email and to send to self and print.	✘ Selection of the Coumadin brand can be confusing – not all the strengths of Coumadin tablets in the app are available in New Zealand and the colours of the different strengths may differ to that used in New Zealand (there is a statement in the app reminding users about this, but it can be missed). ✘ Unable to add variable warfarin dose patterns. This app records the warfarin dose as a weekly dose. ✘ If you have accidentally ticked that you have taken your warfarin dose for the day, this action cannot be reversed. ✘ Unable to edit the daily dose if needed (for example, if a dose adjustment is required) and unable to add older INR test results. ✘ Doesn’t provide additional patient information about warfarin (but the intention is for recording only and to see a healthcare professional if there are any concerns). ✘ The app selects the most appropriate daily dosing based on the overall weekly dose, which may be a different schedule to what people are used to taking. ✘ Available on iTunes for Apple devices only. Not available in the Play Store.

PROS

CONS

✔ Simple and easy to use.

✔ Optional reminders to take warfarin and arrange blood tests on time.

✔ Displays blood results on a graph so trends can be monitored.

✔ Images of the tablets can help patients/carers to take the right dose and be familiar with their warfarin tablets.

✔ Prepares a clear printable report to share results with nominated GP via email and to send to self and print.

✘ Selection of the Coumadin brand can be confusing – not all the strengths of Coumadin tablets in the app are available in New Zealand and the colours of the different strengths may differ to that used in New Zealand (there is a statement in the app reminding users about this, but it can be missed).

✘ Unable to add variable warfarin dose patterns. This app records the warfarin dose as a weekly dose.

✘ If you have accidentally ticked that you have taken your warfarin dose for the day, this action cannot be reversed.

✘ Unable to edit the daily dose if needed (for example, if a dose adjustment is required) and unable to add older INR test results.

✘ Doesn’t provide additional patient information about warfarin (but the intention is for recording only and to see a healthcare professional if there are any concerns).

✘ The app selects the most appropriate daily dosing based on the overall weekly dose, which may be a different schedule to what people are used to taking.

✘ Available on iTunes for Apple devices only. Not available in the Play Store.

Clinical review

Reviewer: Johanna Lim FCSANZ, FANZCAP (Cardiol.), Clinical Pharmacist – Cardiology Expert, Health New Zealand | Te Whatu Ora Te Matau a Maui Hawke’s Bay
Date of review: May 2025
Version: 1.21
Platform: Apple
Comments: INR log is a New Zealand developed, simple and easy-to-use tool for patients and their whanau to track and manage their warfarin dosing and INR results. It also has a reminder function to help you remember to take your warfarin, and also remind you when your INR test is due.
INR results can be emailed or printed in a table or graph format for you to share with your healthcare providers.
The app is easy to navigate.
Safety concerns: None.
New Zealand relevance: Yes.

Warfarin
Warfarin and INR
Warfarin apps
Consumer guide: how to choose a health app
Clinicians guide: how to choose a health app
Security and privacy of health apps

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