INR log

The INR log app is for people who are taking warfarin and their carers to keep track of their warfarin dose and INR results. Users are required to set their therapeutic INR range (upper and lower limit), select the tablets they use (brand and strength) and their test results (date done and INR result).

To help users identify the warfarin tablets they are taking, the app has images of the different brands (Marevan or Coumadin) and strengths. Users can set daily medication reminders and reminders for when their next test is due. The Resources section has provision to add or delete results and to add previous results. For the complete app description, go to the App Store(external link) or, for a more detailed review, see reviews below.

Clinical review

Reviewer: Angela Lambie, Pharmacist, Auckland
Date of review: August 2019
Version: 1.21
Platform: Apple
Comments: This app is a simple way to keep track of your INR results and warfarin dose. It has optional reminders to take warfarin tablets and to have an INR blood test. INR results are displayed in a graph which is useful to check if they are within the target range and to monitor trends over time. Results can be prepared into a printable report to email to self or nominated GP. Overall this is a very simple and clear tool to help people to take their warfarin at the right dose and on time.
Safety concerns: None, but relies on data being correctly entered.
New Zealand relevance: Relevant to New Zealand users – the app was developed in New Zealand. Marevan is the most commonly used brand of warfarin in New Zealand. Not all the strengths of Coumadin tablets in the app are available in New Zealand. There is a caution reminding users to be careful when selecting their tablets – different colours are used in different countries.