# h₂éwsōs — Caffeine Tracker, Sleep Curfew

> Caffeine Tracker, Sleep Curfew (iPhone/iPad app by Valentin Lechner.)

- Source: https://appshunter.io/ios/app/hewsos/id6756838379 (this page in markdown: same URL + `.md`)
- Developer: [Valentin Lechner](https://appshunter.io/developer/1615734904)
- Category: Food & Drink, Lifestyle
- Price: $0.99
- Age rating: 12+
- Requires: iOS 18.0 · 3 MB
- Languages: American English
- Released: 2026-02-06
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/hewsos/id6756838379/reviews.md

## What is h₂éwsōs?

Stay on top of your caffeine intake with a simple log, clear visuals, and helpful timing estimates designed to support better daily planning.

Key features:

-Log drinks in seconds: Espresso, coffee, energy drinks, tea, soda, or custom entries
-Sipping duration support: Track slow drinks more realistically than “instant” intake
-Barcode scanning & search: Look up products via OpenFoodFacts and use estimated caffeine values when available
-Active caffeine estimate (mg): See an at-a-glance view of what may still be in your system over time
-Personalized half-life settings: Adjust your profile (age, weight, gender, and optional factors) to tailor estimates
-Sleep planning tools: Target a bedtime, view a projected “sleep-ready” time, and get a suggested caffeine curfew
-Trends & insights: Daily history plus a 7-day overview (totals, drink count, peaks, and bedtime estimates)
-Calibration: Optionally log how you feel to fine-tune the app’s internal estimate over time
-On-device storage: Your entries and profile are saved locally on your device

Important note:
All values are estimates based on common caffeine metabolism models and the information you provide. This app is not a medical device and is not intended to diagnose, treat, or prevent any condition.


## Version history (last 1 release)

### 1.0 — 2026-02-06

No release notes.

## More apps by Valentin Lechner

- [SVG Designer](https://appshunter.io/ios/app/svg-designer/id6477757843)
- [Aurale](https://appshunter.io/ios/app/aurale/id6741387200)
- [GameBox Hub](https://appshunter.io/ios/app/gamebox-hub/id6741738473)

All apps by Valentin Lechner: https://appshunter.io/developer/1615734904

---

*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 2026-08-18.*