Exploring the economic potential of Tellmi: a novel digital mental health support app for children and young adults

Published Date: 24th December 2025

Publication Authors: Ng. SM

Background
Digital peer support apps can assist with mental ill health. We present an early economic evaluation of Tellmi, a related and novel app for children and young people (CYP).

Methods 
Tellmi users were surveyed; healthcare resource use over 3 months was captured. Data informed the development of an early cost-comparison model, capturing cost and resource use differences (CYP using Tellmi vs standard care). A 1-year time horizon was used, and the model was built from a National Health Service (NHS) perspective. Deterministic sensitivity analysis highlighted key driving parameters.

Results
There were 283 responses. Tellmi use for more than 1 month resulted in significantly fewer accident and emergency, general practitioner and school nurses/counsellor visits (vs standard care). An early cost calculator model estimated that Tellmi use led to an NHS cost saving of £214 per person (excluding service cost).

Conclusions
Tellmi has the potential to be cost saving to the NHS. Further evidence is needed.

Ng, SM et al. (2025). Exploring the economic potential of Tellmi: a novel digital mental health support app for children and young adults. BMJ Paediatric Open. 9(1), p.e003592. [Online]. Available at: https://doi.org/10.1136/bmjpo-2025-003592 [Accessed 24 December 2025]