LAVRENTIUS.DEV · Android Apps

Free apps.
No ads. No strings.

A collection of purposeful Android applications for health, fitness, education, and wellness — crafted with care and released completely free of charge.

AMSS

Acute Mountain Sickness Score — right in your pocket

AMSS is a practical digital companion to the 2018 Lake Louise Acute Mountain Sickness Score (AMSS) Questionnaire (NCBI reference). Acute mountain sickness (AMS) is a syndrome affecting non-acclimatised individuals who ascend to high altitudes, typically above 2,500 metres, caused by decreased atmospheric oxygen partial pressure inducing hypoxia. AMSS puts the validated clinical tool at your fingertips — whether you are a hiker, mountaineer, expedition medic, or wilderness guide.

  • Based on the validated 2018 Lake Louise AMS Score framework
  • App settings persist across sessions for uninterrupted use
  • All data processed and stored locally — nothing leaves your device
  • No account, no tracking, no advertisements
Free Ad-free No data collected Rated 3+
Get on Google Play
AMSS app icon AMSS
AMSS app screenshot – self-report questionnaire AMSS app screenshot – score result

Upa Intervals

Sequence training timer for sports, yoga & wellness

Upa Intervals is a fully customisable interval timer built for sequence training across sports and wellness disciplines — including yoga, rehabilitation, and meditation. It serves as a companion to an upstream app, scheduled for release in late 2026. Activities labelled "Rest" are highlighted in a distinctive red colour so you never lose your place in a sequence. A built-in metronome that runs at 50 bpm supports rhythmic, mindful practice.

  • Create and edit unlimited custom activity sequences
  • Rest activities highlighted in red for instant visual cue
  • Export & import sequences to share with other users
  • Mattro metronome at 50 bpm (1.2 s intervals ≈ 1 mātrā)
  • Automatic backup of application settings across sessions
  • No data collected or transmitted — fully offline
Free Ad-free Export / Import Built-in Metronome
Get on Google Play ↗ Upa Blog
Upa Intervals app icon Upa Intervals
Upa Intervals app trailer thumbnail

Pubbr

The EPUB reader Android deserved — with real JavaScript support

In the digital age, an increasing number of educational resources are published in the universal EPUB-3 format, taking advantage of the interactivity that JavaScript enables. On Android, however, most EPUB readers offer minimal JavaScript support — leaving interactive textbooks, simulations, and educational tools inaccessible on mobile. Pubbr was built specifically to fill that gap. Its intentionally clean and minimalist interface keeps the focus on the content, while under the hood it handles a wide range of JavaScript features that bring EPUB-3 documents fully to life.

  • Extensive JavaScript support for interactive EPUB-3 documents
  • Open .epub files directly from your file manager
  • Keyword search, bookmarks, themes, and font-size adjustment
  • Bundled Demo.epub showcasing JS capabilities
  • External links disabled by design for security
  • Open source sample EPUB documents — available on GitHub (lavrentius-dev/pubbr)
Free Ad-free Open Source EPUB-3 + JS
Get on Google Play
Pubbr app icon Pubbr
Pubbr app trailer thumbnail

Poteca

The rebirth of Dynamic Signaling Maps™ — on Android

Poteca is an upcoming app rooted in a remarkable piece of bioinformatics history. In the early 2000s, a web-based software called Dynamic Signaling Maps™ (DSM) was developed by Hippron Physiomics Inc. for the dynamic visualization and analysis of cell signal transduction pathways. DSM used 3D layered directed graphs to visualize complex biological networks, and was cited in scholarly work alongside databases such as KEGG and BioCarta. Now, that legacy is being reborn as a native Android app under the name Poteca.

  • Syntax Checker — validates custom signaling pathway events encoded in the symbolic language DSML, covering five fundamental classes of signaling events
  • Converter — processes DSML documents via a custom layered graphics engine, producing editable and scalable vector pathway maps
  • Pathway Analyzer — predicts the impact of activating or inhibiting selected pathway elements on the rest of the network
  • Pathway Extractor — computes metabolic pathways from time-series RNA microarray data
Free to download Optional paid features Bioinformatics In Development
Coming to Google Play ↗ Poteca Blog
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A bioinformatics legacy, reborn on Android

Dynamic Signaling Maps™ was a pioneering web-based tool for visualizing cell signaling transduction pathways using 3D layered directed graphs, cited in academic literature alongside KEGG and BioCarta (2002–2004). Poteca brings its four core modules — Syntax Checker, Converter, Pathway Analyzer, and Pathway Extractor — to Android. The app is free to download, with optional paid features for advanced functionality.

Relevant to systems biology, proteomics & drug discovery research.

Coming Soon