Privacy Policy

Who we are

Makuro (“we”, “us”) is a service of DeepArch Co., Ltd. (ＤｅｅｐＡｒｃｈ株式会社), a company registered in Japan. You can reach us at [email protected].

Information we collect

Information you enter

To do its job, Makuro stores what you log: foods and meals, body weight, and the profile details that drive your targets (such as height, age range, sex, activity level, and goal). This is stored on your device.

Apple Health (HealthKit)

With your explicit permission, Makuro can read and write body-weight data to Apple Health so your weight stays in sync across your apps, and — if you opt in — read your daily activity energy (from Apple Watch or iPhone) to inform your starting expenditure estimate. Data obtained from Apple Health is used only to provide Makuro’s features — never for advertising or marketing, and it is never sold or shared with third parties for their own purposes. You can turn this off any time in the Health app or iOS Settings. If you turn on AI connections, your energy estimate, which can reflect this data, can be read by the assistants you connect (see “AI connections” below).

Meal photos

When you log a meal by photo, the image is sent to our AI provider — Anthropic (the Claude API) — through our secure backend, to identify the foods and estimate portions. The result is returned to you to review and save. The photo is used only to produce that result: it is processed under Anthropic’s API terms (under which API data is not used to train their models) and is not stored on our servers after your request is handled. If you don’t use photo logging, no images leave your device.

AI connections (optional)

If you turn on AI connections (Me → AI connections in the app), you can use Makuro from AI assistants such as Claude and ChatGPT. So that the assistants you connect can read your data, Makuro then keeps a copy of the following on its servers: your food diary, going back about a year from when you turn this on, including any notes on your entries; your calorie and macro targets; the weigh-ins you entered in Makuro; your latest energy expenditure estimate; and your time zone, weight unit and language.

Data imported from Apple Health is not copied to our servers, and neither are photos, sleep, body measurements or profile details such as your height, age or sex. Your energy estimate is calculated on your device and can reflect Apple Health data.

This is off by default. We copy nothing until you turn it on and confirm, and only assistants you connect, using the permissions you choose on Makuro’s sign-in page, can read the copy. Foods and weigh-ins an assistant logs for you are held on our servers until the app adds them to your diary, and are removed after that, at the latest when you turn the feature off.

Diagnostics

Makuro uses Apple’s built-in App Analytics and crash reporting, provided through the App Store and Xcode. This information is aggregated by Apple and does not identify you to us. We do not use third-party analytics or advertising SDKs, and there are no advertising identifiers.

How we use your information

• To provide the core features: logging, calorie and macro targets, and trends.
• To personalize your targets to your own data over time.
• To respond to you when you contact support.
• If you turn on AI connections: to answer requests from the AI assistants you have connected, and to add what they log to your diary. We don’t use this copy for anything else.

We do not sell your personal data, and we do not use your health data for advertising.

Who we share it with

We share data only with service providers that help us run the app, and with AI assistants you choose to connect:

• Anthropic — processes the meal photos you submit (the Claude API), via our backend, to return food recognition.
• Apple — provides the App Store and aggregated analytics and crash reporting, each under Apple’s own terms.
• Cloudflare — hosts our backend: the secure service that relays photo requests to Anthropic, which does not retain your images, and, if you turn on AI connections, the copy described above. That database is located in the Asia-Pacific region, and requests may be handled in other countries where Cloudflare operates.
• AI assistants you connect (for example Claude by Anthropic, or ChatGPT by OpenAI) — only if you turn on AI connections and connect them. What an assistant reads becomes part of your conversation with that service and is handled under its provider’s own terms and privacy policy and your settings there, not this policy. Please review them.
• When required by law, or to protect the rights and safety of our users and others.

Where your data lives & security

Your tracking data is stored on your device and, so it survives device changes and reinstalls, synced through your private iCloud account using Apple’s CloudKit. That copy lives in your iCloud and is governed by Apple’s terms, and we cannot access it. We keep no separate copy of your data unless you turn on AI connections. In that case we keep the copy described under “AI connections” until you turn the feature off or delete your account. If your Makuro Pro subscription ends while AI connections are on, assistants lose access, but the copy is kept until you turn the feature off. We use reasonable technical and organizational measures to protect data in transit and at rest, though no method of transmission or storage is 100% secure.

Your choices and rights

• Edit or delete your logged data within the app at any time.
• Revoke Apple Health access in the Health app or iOS Settings.
• Disconnect any single AI assistant in Me → AI connections. Its access stops right away. You can also remove Makuro in the assistant’s own settings.
• Turn off AI connections at any time. Every connected assistant loses access, and we delete our copy of your data, the pending-import inbox and the list of connected assistants. Anything an assistant already logged stays in your diary. Deleting your Makuro account does the same.
• Depending on where you live — for example under Japan’s Act on the Protection of Personal Information (APPI), the EU/UK GDPR, or California’s CCPA — you may have rights to access, correct, delete, or export your personal data. Contact us to exercise them.

Our website

This website (separate from the app) uses Cloudflare Web Analytics — a privacy-first, cookieless analytics service — to understand aggregate traffic such as page views, referrers, and visitor countries. It sets no cookies, does not track you across sites, and does not collect information that identifies you. That’s why you don’t see a cookie banner.

Children

Makuro is intended for users aged 17 and older. It is not directed to children, and we do not knowingly collect data from anyone under 17.

Changes to this policy

We may update this policy from time to time. Material changes will be reflected here with a new effective date.

Contact

Questions about privacy? Email [email protected]. See also our Terms of Service.