# Precision Compass: AI Health — Blood Work, HRV & Gut Tracker

> Personalized health insights and nutrition guidance based on your data. (iPhone/iPad app by Shuichiro Nakahara.)

- Source: https://appshunter.io/ios/app/precision-compass-ai-health/id6810634720 (this page in markdown: same URL + `.md`)
- Developer: [Shuichiro Nakahara](https://appshunter.io/developer/6788214971)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 17.0 · 49 MB
- Languages: American English, French (France), German (Germany), Japanese
- Released: 2026-09-29
- Data updated: 2026-11-10
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/precision-compass-ai-health/id6810634720/reviews.md

## What is Precision Compass?

Find today's one step that fits you, from your data and how you feel.
Precision Compass brings in sleep, heart rate, and activity from Apple Health and lays them over your log of meals, how you feel, and more. Connected, your data becomes a map of your own health.

Your checkup came back fine, yet you still feel a little off. Health advice tends to be the same for everyone, but every person is different.
Precision nutrition starts from one person's data to think about the food and habits that suit them. The only person you're compared with is your past self.

- Today's insight and Today's one step
Log how you feel this morning and receive Today's insight, drawn from yesterday's log and your Apple Health data: "Looking back on yesterday," "Today's advice," "For today," and "OK to skip today."
Pick one item from "For today," or write your own. That's Today's one step. Look back on it with "Done," "Partly done," or "Skipped," and your next insight takes it into account.
On days without an insight, you'll still see "Yesterday's summary."

- Five principles behind the insights
From precision nutrition counselor Shuichiro Nakahara's counseling and podcast:
How you feel comes first. See how it all connects. Subtract before you add. Start with the foundation: stomach, liver, gut. Follow the trend, not the moment.
AI puts your insight together from these. It's one point of reference; the choice is yours.

- Observations
What has moved together in your records appears as a line, like caffeine and your sleep.
Lines grow as you log; once clear, they're marked "Connected." With past data in Apple Health, some may show up right away. Curious? "Check for yourself" over 14 days.

- Your everyday data, in one place
Most devices that sync with Apple Health work: smartwatches, smart rings, scales, blood pressure monitors.
Log how you feel (1 to 5), meals (a photo, or a tap for the dish and portion), water and caffeine, alcohol and tobacco, bowel movements, periods, workouts, and events. Log from Apple Watch too.
See where today stands against your 30-day average, set a monthly focus, and look back with a calendar and search.

- Blood test and glucose records
Add checkup results as a PDF or photo. AI reads them; you check and save them. Or enter them by hand.
More than 60 markers are shown next to optimal ranges, which are precision nutrition guides by sex, not medical reference ranges.
If you use FreeStyle Libre, import your records through LibreView in the app and see glucose after meals next to what you ate.

- Free
All logging, Apple Health and Apple Watch integration, graphs and history, blood test entry by hand, glucose import, Today's insight up to 3 times in total, connection names in Observations, and reading 1 test document in total.

- Paid plan
Today's insight once a day, connection lines and 14-day tries, and reading up to 3 test documents a day. If you end the plan, your log and past insights stay with you.

- Your data and AI
No login needed. Your log, photos, and test results stay on this iPhone. Anything is sent to AI or to a counselor only after you've checked what will be sent and agreed to it.

- Counseling
Personal Wellness Counseling with a precision nutrition counselor is currently offered in Japanese. Sessions in English are coming soon.
https://www.precision-nutrition.jp/en/

A map of your own health begins with how you feel this morning.

- Please note
Precision Compass is not a medical device. It is not intended to diagnose, treat, cure, mitigate, or prevent any disease or medical condition. If you have concerns about your health, please see a doctor.

- Subscription and terms
The paid plan is an auto-renewing monthly or yearly subscription. Cancel or change it from "Cancel or change plan" in the app.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.precision-nutrition.jp/en/precision-compass/privacy/

## Key features

- Personalized daily insights and actionable steps
- Integrates with Apple Health data
- Tracks meals, feelings, and habits
- Analyzes blood work and glucose levels
- Identifies connections between lifestyle factors
- AI-driven health recommendations

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Paid plan (monthly) | $9.99 | per month |
| Paid plan (yearly) | $99.99 | per year |


## Is Precision Compass safe?

Not enough ratings yet to assess Precision Compass.

## Is Precision Compass legit?

Precision Compass: AI Health has limited verification signals. The AppsHunter Legitimacy Score for Precision Compass is 58 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/precision-compass-ai-health/id6810634720/reviews.md

### 5/5 — 日々のモチベーションになります！

*2026-10-26*

毎日記録が積み重なっていきそのヒントが届くので自分の身体が理解でき頑張るモチベーションになってます！

**Developer response:** 高評価ありがとございます！
日々使い勝手やヒントの質の向上目指して改善してますので、これからもよろしくお願いいたします！

## Frequently asked questions about Precision Compass

### What is Precision Compass?

Precision Compass is a health and fitness app that uses your personal data from Apple Health and your daily logs to provide tailored insights and actionable steps for better nutrition and habits. It helps you understand connections between your food, feelings, and physiological metrics.

### Does Precision Compass have ads?

No, Precision Compass does not contain advertisements. The app is free to use with optional paid features available through a subscription.

### How does Precision Compass use my data?

Precision Compass integrates with Apple Health to import sleep, heart rate, and activity data. It also uses your manual logs of meals, feelings, and other habits to generate personalized health insights and identify connections.

### What are the subscription options for Precision Compass?

Precision Compass offers a paid plan with daily insights, connection lines, and the ability to read up to 3 test documents per day. This plan is available as a monthly subscription for $9.99 or a yearly subscription for $99.99.

### Can Precision Compass import blood test results?

Yes, Precision Compass allows you to add checkup results as a PDF or photo, which the AI reads. You can also enter them by hand. The app displays over 60 markers next to optimal ranges.

### What devices are compatible with Precision Compass?

Precision Compass is supported on iPhones and Apple Watches. Most devices that sync with Apple Health, such as smartwatches, smart rings, scales, and blood pressure monitors, can also integrate with the app.

### How often is Precision Compass updated?

The latest version of Precision Compass is 1.9, and it was last updated on November 10, 2026. Updates typically occur to improve features and reliability.

### What age rating does Precision Compass have?

Precision Compass has an age rating of 17+. This is due to the nature of the health data it tracks and analyzes, which may be more relevant for adult users.

## Version history (last 5 releases)

### 1.9 — 2026-11-10

• Precision Compass is now available in French, on iPhone and Apple Watch.

### 1.8.1 — 2026-11-07

• Minor fixes.

### 1.8 — 2026-11-07

• Precision Compass is now available in German, on iPhone and Apple Watch.
• Symptoms you note in English, such as chest pain, now bring up the “When to contact a doctor” card.

### 1.7.1 — 2026-11-05

• Supplement advice in Today's insight now takes your meals and how you felt into account.
• Today's log and supplement schedules on Apple Watch now follow the Watch's language.

### 1.7 — 2026-11-04

Precision Compass is now available in English.
- The whole app, including Today's insight, data handling consent and the privacy policy, can be used in English.
- Blood test results can be shown in SI units (mmol/L, µmol/L, g/L) or conventional units, matching the glucose unit setting.
- Quick meal logging: tap a dish and portion, on iPhone and Apple Watch.

## More apps by Shuichiro Nakahara

- [Sober Pays: Quit Drinking](https://appshunter.io/ios/app/sober-pays-quit-drinking/id6788214969)

All apps by Shuichiro Nakahara: https://appshunter.io/developer/6788214971

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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 2026-11-10.*