# Cutoff: Caffeine & Sleep — Know when to stop drinking

> Know when to stop drinking (iPhone/iPad app by JACOB SAWYER STARCKE.)

- Source: https://appshunter.io/ios/app/cutoff-caffeine-and-sleep/id6792081913 (this page in markdown: same URL + `.md`)
- Developer: [JACOB SAWYER STARCKE](https://appshunter.io/developer/6781753920)
- Category: Health & Fitness, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 2 MB
- Languages: American English
- Released: 2026-07-24
- Data updated: 2026-08-09
- User reviews in markdown: https://appshunter.io/ios/app/cutoff-caffeine-and-sleep/id6792081913/reviews.md

## What is Cutoff?

Cutoff shows how much caffeine is actually in your body right now, and estimates your wind-down window — the range of times it typically drops below the level that starts affecting sleep.

A range, not a single time. Caffeine's half-life varies from about 2 to 10 hours between people, so a confident "you're clear at 9:47 PM" is false precision. Cutoff shows an honest window instead, and you can tune it to match what you actually notice.

WHAT MAKES CUTOFF DIFFERENT

• One tap to log. Coffee, espresso, cold brew, tea, energy drinks, or a custom amount.
• A live curve. Watch caffeine rise and fall through your day, modelled the way pharmacology actually does it — absorbed over an hour, then cleared at a steady rate.
• Two honest answers. Most apps show one confident cutoff time. Cutoff shows both its own estimate and what sleep research suggests — which often points earlier — and lets you see where they disagree, rather than pretending they agree.
• A screen that reads your state. The background warms as your caffeine climbs toward your daily limit, so you can tell where you stand at a glance.
• Trends that build over time. A 13-week intake heatmap, your typical day, and when you usually have your first cup.
• Sleep, side by side. Connect Apple Health to see your sleep next to your caffeine. If you use Oura or Whoop, their sleep flows into Apple Health too. Shown honestly — not as cause and effect.

PRIVATE BY DESIGN

Everything stays on your device. No account, no sign-in, no server, no analytics, no ads. Cutoff has no networking code at all — it cannot send your data anywhere. Export your log as a CSV or delete everything, any time.

Cutoff is for general information and self-awareness. It doesn't diagnose, treat, or prevent anything, and it can't tell you how you'll sleep — caffeine is one of many things that affect that.


## Version history (last 1 release)

### 1.0 — 2026-07-24

No release notes.

## More apps by JACOB SAWYER STARCKE

- [Momentum Day Planner](https://appshunter.io/ios/app/momentum-day-planner/id6791756549)
- [Bloom Cascade](https://appshunter.io/ios/app/bloom-cascade/id6792526835)

All apps by JACOB SAWYER STARCKE: https://appshunter.io/developer/6781753920

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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 2026-08-09.*