# Calmgraph: Stress & HRV — Daily stress score tracker

> Daily stress score tracker (iPhone/iPad app by YANGLI CHEN.)

- Source: https://appshunter.io/ios/app/calmgraph-stress-and-hrv/id6790698772 (this page in markdown: same URL + `.md`)
- Developer: [YANGLI CHEN](https://appshunter.io/developer/1886058795)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 9 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more
- Released: 2026-07-21
- Data updated: 2026-08-18
- User reviews in markdown: https://appshunter.io/ios/app/calmgraph-stress-and-hrv/id6790698772/reviews.md

## What is Calmgraph?

Calmgraph turns your daily stress into one number you can actually act on - fully on-device, no subscription.

■ Stress score (0-100)
From Apple Watch HRV, resting heart rate, and sleep, measured against YOUR personal baseline rather than a single absolute value. The first 14 days are a calibration period shown as provisional.

■ Cause tags and calendar
Tag work, sleep, exercise, caffeine and more, layered onto your score. The calendar view shows a month at a glance, and you can tap any past day to fix its tags or check-in.

■ Weekly insight and tag correlations
See what likely moved your score each week. The Pro correlation report compares your average on days with a tag against days without it, and always shows the sample size. These are correlations, not conclusions.

■ Apple Watch and widgets
The Watch app and complication put your score on your watch face and let you check in from your wrist - free. Home and Lock Screen widgets are part of Pro.

■ Breathing guide and reminders
A 1, 3, or 5 minute breathing guide for the days that sit in the strain band. Daily logging reminders and a weekly review notification are optional.

■ One-time purchase and backup
Buy once instead of subscribing. There is no cloud sync, but you can export a backup to a single file and restore it on another device.

■ Monthly & yearly summary / Weekly history (Pro)
Averages by month and year, with the calm / mixed / strained mix. Past weeks with their average and what was moving your score.

All measurements are processed on your device. Nothing is sent off-device, collected, or used for advertising.

Calmgraph is not a medical device and is not intended to diagnose or treat any condition. Consult a healthcare professional about any health concern.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Calmgraph Pro | $9.99 | one-time |



## Version history (last 3 releases)

### 1.2 — 2026-08-14

A big readability pass. Text on light fills — calendar dates, change badges — was too faint to read; all of it has been reworked.
New: monthly and yearly summary (Pro). Averages by month and year, with the calm / mixed / strained mix.
New: weekly history (Pro). Past weeks with their average and what was moving your score.
Apple Watch can now run a breathing session on its own, and you can tag the day right from your wrist.
Closing a half-written check-in now asks before discarding it (it used to vanish silently).
Custom tags can be renamed. Restoring a backup now keeps the calibration state.

### 1.1 — 2026-08-07

Calendar view: tap any past day to fix its tags or check-in after the fact.
Tag correlations (Pro): compare your average on days with a tag against days without, across your whole history.
Backup and restore: move everything to a new device with a single file.
Check-ins can now hold a short note, and you can browse them in a history list.
Check in straight from Control Center or a Shortcut.
Connect Apple Health at any time from Settings.
The trend tab now shows a period summary: average, highest and lowest day, and days per band.
Also fixed: chart accessibility, large text sizes, and the weekly notification day.

### 1.0 — 2026-07-22

No release notes.

## More apps by YANGLI CHEN

- [Trero: Workout Log & Goals](https://appshunter.io/ios/app/trero-workout-log-and-goals/id6760746164)
- [PrintSummary: School Handouts](https://appshunter.io/ios/app/printsummary-school-handouts/id6761879860)
- [SaunaFlow: Sauna & Cold Timer](https://appshunter.io/ios/app/saunaflow-sauna-and-cold-timer/id6761906547)
- [IeKan: Family Home Care](https://appshunter.io/ios/app/iekan-family-home-care/id6764244913)
- [TsukiLift - Cycle & Strength](https://appshunter.io/ios/app/tsukilift-cycle-and-strength/id6767084251)
- [CareHours: Caregiver Wages](https://appshunter.io/ios/app/carehours-caregiver-wages/id6769304063)

All apps by YANGLI CHEN: https://appshunter.io/developer/1886058795

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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 2026-08-18.*