# Home Dim Light Melatonin Onset

> Home Dim Light Melatonin Onset (iPhone/iPad app by The University of Michigan.)

- Source: https://appshunter.io/ios/app/home-dim-light-melatonin-onset/id6738533633 (this page in markdown: same URL + `.md`)
- Developer: [The University of Michigan](https://appshunter.io/developer/380339599)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 177 MB
- Languages: English
- Released: 2026-04-17
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/home-dim-light-melatonin-onset/id6738533633/reviews.md

## What is Home Dim Light Melatonin Onset?

The dim light melatonin onset (DLMO) is the gold standard circadian phase marker in humans. We previously developed a proof-of-concept home DLMO kit and demonstrated that valid DLMOs could be collected at home, with objective markers of light exposure and sample timing. Nonetheless, the proof-of-concept kit uses costly external technologies such as photosensors (to monitor light exposure) and MEMS TrackCaps (to monitor sample timing). 

We have designed an iPhone app that: 
(1) streamlines the home DLMO collection procedure, 
(2) maintains the objective assessment of light exposure and sample timing with internal app features, 
(3) provides real-time feedback on errors in light exposure and sample timing to both participants and externally located researchers, and 
(4) provides some cost savings over the original proof-of-concept kit. 

Programming capability includes options to (1) sample saliva at half-hourly or hourly intervals, (2) end sampling at participants’ habitual bedtime or up to 3 hours past habitual bedtime, and (3) set a light intensity threshold of choice to alert the research participant and externally located researcher in real-time that melatonin levels may be suppressed. 

At the conclusion of the home DLMO collection, the app generates a report of light levels and sample timing for the researcher. Saliva samples can then be sent to a qualified laboratory for assay processing.


## Version history (last 1 release)

### 1.0.2 — 2026-06-02

* Updated intro video
* Updated closed captioning

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All apps by The University of Michigan: https://appshunter.io/developer/380339599

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*