Track Your Family's Weight, Simply & Privately

Log and visualise your family's weight journey from newborns to grandparents, with WHO-based reference charts and gentle weekly reminders.

Start logging free See how it works
✓ Free, no credit card · ✓ No ads · ✓ No trackers · ✓ Your data is never sold · ✓ EU hosted
Frederik and his son

Why I built this

My name is Frederik Wouters. My son Andreas has always been very low on weight. For years we tracked this in booklets and SMS threads: scattered, hard to compare, easy to lose. I built WeightLog to finally see the trend clearly, with context from WHO reference data.

It also made me start logging my other son, who I never bothered measuring because "he's normal". Turns out, now we actually know that. As we say in Dutch: meten is weten, measuring is knowing.

WeightLog runs on a server I pay for myself. If it's useful to you, a coffee goes a long way.

☕ Buy me a coffee

Everything your family needs

Simple, focused tools to keep your family healthy without the complexity.

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Visual Weight Charts

Beautiful line charts per family member, showing weight over time with trends at a glance.

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WHO Reference Charts

Compare each person's weight against age-appropriate WHO averages, from babies to adults.

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Weekly Reminders

A gentle weekly nudge so you never forget to weigh in. Simple and unobtrusive.

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Whole Family, One Place

Add as many members as you like. Each gets their own detail page with full history.

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Private by Design

Only you see your family's data. No ads, no tracking, no selling of your health information.

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Fast & Simple

Log a weight in seconds. No clutter, no bloat, just the features you actually need.

How it works

Up and running in under two minutes.

1

Create your account

Enter your email and we send you a one-click login link. No password needed.

2

Add family members

Name, date of birth and gender. That is all we need to show the right reference chart.

3

Log & watch trends

Tap "Log Weight", enter the reading, done. Your charts update instantly.

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Proudly European

WeightLog is built, hosted, and operated entirely within the European Union. Your data never leaves Europe. We use European mail services and comply fully with GDPR, because your family's health data deserves European-level protection.

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EU Hosting
Servers in Europe
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EU Mail Services
European email providers
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GDPR Compliant
Privacy by design

See it in action

A clean, focused interface designed to be used in under a minute.

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Family Dashboard

Family Dashboard

Stats for every family member at a glance, with a quick link to log a new weight.

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Manage Family

Manage Family

Add or remove family members and see how many weigh-ins have been recorded.

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Log a Weight

Log a Weight

Pick a family member, enter a weight and an optional note. Done in seconds.

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Weight Over Time

Weight Over Time

Personal detail page with an interactive chart and full log history, including the WHO reference line.

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Knuffel

Knuffel

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Ready to start logging?

Free, private, and takes less than a minute to set up.

Get started free

No password required. Just your email address.

🚫 No ads 🚫 No trackers 🚫 Your data is never sold 🇪🇺 Hosted in Europe

Available in

🇬🇧 EN 🇳🇱 NL 🇫🇷 FR 🇩🇪 DE 🇦🇹 AT 🇮🇹 IT 🇪🇸 ES 🇵🇹 PT 🇵🇱 PL 🇺🇦 UA 🇭🇺 HU 🇸🇰 SK 🇨🇿 CZ 🇸🇮 SI 🇫🇮 FI 🇸🇪 SE 🇩🇰 DK 🇪🇪 EE 🇱🇹 LT 🇱🇻 LV 🇬🇷 GR