Tel: +44 (0) 1904 406082

AppDx FAQs

Below are some of the most frequently asked questions we receive concerning our customisable smartphone lateral flow reader, AppDx.

How does the App work?

AppDx is a smartphone based lateral-flow reader, and performing the test is as simple as taking a photo. The home screen of the app provides users with a number of options including ‘perform a test’, ‘view test log’ or carry out a ‘quality control’ analysis, plus many other functions according to the clients’ requirements.

An example workflow can include:

  • Scan barcode of test to verify the test type, calibration information, expiry date etc.
  • An on-screen guide will detail the testing protocol, such as the addition of the sample.
  • The app will start a countdown timer for the development of the test
  • After the appropriate time has elapsed it will guide you to capture a picture of the test.
  • The test result will be presented within a few seconds.
  • You can share the result by email, or simply upload to web or cloud service of your choice.

What does it cost to customise the App for our assay?

Each project is very different and the cost will depend on the level of customisation, the complexity of the assay, and the regulatory requirements. We will need to scope the project in full to be able to provide an accurate quotation.

What are the ongoing costs, i.e pay per download, annual license fee, and monthly contract?

We do not employ a ‘pay per download’ model, instead, we have an annual license and maintenance fee, and monthly contract. The cost will depend on the level of support required.

What are the regulatory implications of using the App in the medical sector?

If you are using the App to provide an interpretation of the assay then the App itself is classified as a medical device and will require the same regulatory considerations as the assay itself.

Can we demo the App using our device?

No, each assay type is different and therefore the App needs to be set up to read each assay, which is part of the customisation work package. We can provide screenshots to demonstrate the look and feel of the platform.

What does the cloud transfer look like?

The App can securely transfer and retrieve test data, calibration information with customer’s cloud-based platform or web portal. Essentially the app provides authentication, using a registered email, to connect with an online service of the customer’s choice. Using SOAP or REST Web APIs it can interact with the portal. It can even export and store the data on file hosting services such as Dropbox if needed.

How long will customisation take?

It will vary depending on the level of work required, it can be as short as 2-3 months for adaptation of our basic software, through to 6-12 months for a significant redesign with regulatory validation.

Will it work on all smartphones?

It is compatible with Android® OS and iOS® and therefore will work on all phones utilising this platform. Please note that each phone type will need to be validated for its performance with the App. Some clients opt to standardise on a set of smartphones, i.e iPhone 5S and above, in this case, all new releases of the iPhone also need to be validated, another option is to restrict use to a subset of phones.

How do I upload the test information into the App?

Traceability is critical for a lateral flow test, therefore, the app provides various methods to input such information. The app can scan test information from a barcode or an NFC tag. Users can also enter the information manually. The app can securely retrieve full information from a short identifier using internet connectivity to a web portal.

Can reading algorithms be incorporated?

Yes, if you want to apply custom logic and analysis algorithms on the test that can be accommodated during the development. A new method can be incorporated into the app even at a later stage, as an update or downloadable parameters.

Can it switch between reading dipsticks and housed cassettes?

The app can be used for dipstick as well as housed cassettes. A reusable placement accessory for dipstick-only tests is recommended. Each type of test needs to be separately optimised for your application.

Can it be used for full quantitation?

Environmental light will differ in the various locations that the test is likely to be used, this will have a difference on the ability for the App to give a reproducible result with a high degree of accuracy. Removing the effect of environmental light can be achieved by using an accessory where the device can be enclosed. Additionally, there is a significant variation of camera characteristics from model to model and to a lesser extent even within the same models.

Achieving a benchtop reader level of performance, with high dynamic range, for a fully quantitative assay under a wide range of conditions may not be practical. However, a shorter dynamic range of quantitation, or semi-quantitative implementation, is achievable.

If you have any additional questions about AppDx please feel free to contact us.

AppDx Smartphone lateral flow reader image


Abingdon Health lateral flow development complete integrated solution banner

Reagent sourcing  –  Assay development  – Reader design  –  Scale-up  –  Lateral flow manufacturing  –  Packaging

Learn more