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Trace: Acne & Skin Tracker

Trace: Acne & Skin Tracker

See If Your Skincare Works

13 ratings
7 reviews
💪 Health & Fitness
Free

Details

  • Released
  • Updated
  • May 13, 2026
  • August 14, 2026

Features

Developer

Siyuan Liang
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About

Track your skincare effectiveness with daily AI-powered face scans. Measure changes in acne, redness, pores, and dullness over 30 days to understand what truly works for your skin. Log lifestyle factors to differentiate product effects from external influences.

✓Daily AI face scans
✓Measures acne, redness, pores, dullness
✓30-day product testing
✓On-device AI analysis
✓Daily journal for lifestyle factors
✓Exportable 30-day reports
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What's New in Trace

1.3.1

August 14, 2026

Trace grew a lot in this update. - Scan your left and right profile, not just the front. Pick the angle right on the Today screen - Trace now speaks French, German, Spanish, and Simplified Chinese - Full iPad support, no more iPhone only screen - Yapping upgrades: check off each product as you talk, a streak calendar, and a satisfying sound for every check-in - Past tests moved into Routine, so products and results live in one place - Buddy chat looks cleaner: new message colors and proper text formatting - Fixed a crash when talking to Buddy with the microphone - Fixed Apple sign-in, rescan slowdowns, and a tutorial that could get stuck - Today screen polish: banner buttons respond on the first tap

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User reviews

Most RecentHighest RatedLowest Rated

Awesome App

This app totally change my skin routine and using it help me identify good product and what product is not working for me. I save tons of money, thank you developer!
ghgh2$tgghgh2$tg

Sometimes the Simple Apps Win

It’s not trying to become a social network or an AI therapist.It just helps me keep track of my skin, and honestly that’s enough.
Seifert BrannonSeifert Brannon

I Actually Remember to Track

I’ve tried journals, spreadsheets, and reminders.This is the first thing I’ve consistently kept up with.
angelinehartcangelinehartc

Easier Than Making Albums

I used to favorite skin photos so I could find them later.That system was…not good.
Lerner AnjanetteLerner Anjanette

Surprisingly Good Motivation

Some mornings I don’t feel like doing skincare.Then I remember I want tomorrow’s photo to look better.
HowarClementinefHowarClementinef
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FAQ

What does Trace measure on my skin?

Trace measures acne, redness, pores, and dullness. It uses on-device AI analyzers to detect and count acne lesions, quantify erythema, measure pore texture, and track luminance and tone evenness.

How does Trace help me test skincare products?

Trace uses a single-product testing method, similar to clinical research. You test one new product while keeping your routine the same, taking daily scans to objectively measure changes over 30 days.

Is my skin data safe with Trace?

Yes, all skin analysis runs entirely on your iPhone. Your photos and scores are synced only to your private, end-to-end secured account. No face data is sent to any third-party AI service.

Why is the testing period 30 days?

Skin cell turnover takes approximately 28 days for adults, and active ingredients often require 4 to 6 weeks to show real change. 30 days provides a minimum honest window to observe product effects.

Can I log other factors that affect my skin?

Yes, Trace includes a daily journal where you can log factors like sleep, diet, stress, period, and travel. This helps you separate product effects from external influences on your skin trends.

What skin conditions does Trace analyze?

Trace analyzes acne by detecting and counting comedones, papules, pustules, and nodulocystic lesions, including IGA clinical grading. It also quantifies redness, measures pore texture, and tracks dullness.

Does Trace have ads?

No, Trace is ad-free. It is a free application with no subscription or upsell to product kits.

What devices does Trace support?

Trace is currently supported on iPhone devices.