Vitamin C Flow
See where your vitamin C goes
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Where is the vitamin C you just took? Absorbing, circulating, in use - the flow inside you, shown gently. Logging is just taps.
Vitamin C is not simply "what you swallow."
The more you take at once, the smaller the share your body absorbs, and whatever it cannot use leaves as urine.
Vitamin C Flow does not just count milligrams.
It shows where that vitamin C is inside you, right now.
■ The current state, at a glance
Just taken / Absorbing / Circulating / In use / Clearing surplus.
A quiet ring and a few drifting particles show today's flow.
■ Logging is just taps
Tablets, powder, gummies, timed release. Kiwi, orange, bell pepper.
Pick the item, pick the time. You will hardly ever see a number pad.
"Now", "30 min ago", "Breakfast", "Before bed" - logging after the fact is easy too.
■ Honest estimates, given as a range
Based on the well-known tendency for larger single doses to be absorbed less efficiently,
the estimated absorbed amount is shown as a range, such as 445-604 mg.
Nothing is stated as fact. Numbers here are not something to be afraid of.
■ All at once, or split through the day
Doses taken close together behave like one larger dose, so less tends to be absorbed.
Split-intake and all-at-once figures help you find a pace that suits you.
■ See that you are keeping it up
The calendar fills in with colour as you log. Blank days are never scolded.
Analysis shows your averages, your sources, and how often you logged.
■ Alongside your health data
Put your vitamin C log next to sleep, steps, active energy and resting heart rate.
"Average sleep on higher vitamin C days tended to be longer" - shown only ever as a tendency.
(This is a correlation, not a causal relationship.)
■ Widgets and Apple Watch
Tap a Home Screen widget to log without opening the app.
Keep today's amount on your Lock Screen. Check and log from your wrist.
■ Your log stays on your device
No account. No ads, no analytics, nothing sent to a server.
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Vitamin C Flow Pro (one-time purchase)
Unlocks the Apple Watch app, month / 3-month / year analysis, comparison with the period before, large and Lock Screen widgets, tap-to-log buttons on the widget, and CSV export. There is no subscription.
Daily logging, Home, Calendar, the weekly view and the Health data comparison are free for everyone.
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This app is not a medical device. The figures shown are estimates based on your own records and general nutritional information; they do not indicate actual blood concentration or health status. Please consult a healthcare professional if you have concerns.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- The meter now shows how topped up you are: full after a dose, draining over the hours
- When it runs low, that is when your next dose absorbs best - on Home and in the widget
- Suggests how to split what is left into 1-3 doses, with times and amounts
- The meter scales to your daily goal
The developer, kazunari aoki, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- kazunari aoki
- Size
- 14.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple Watch
Requires watchOS 11.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Vitamin C Flow Pro $5.99
- Copyright
- © 2026 Kazunari Aoki
