Tarn. vs NuanYue
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tarn.
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A private health journal that puts your privacy first. YOUR DATA, YOUR DEVICE Everything you log stays on your phone. No accounts. No cloud. No servers. Your health data is encrypted with a PIN only you know. SIMPLE TRACKING • Log daily entries with minimal effort • Track patterns over time • View predictions based on your history • Add notes and custom symptoms BUILT FOR PRIVACY • All data encrypted on your device • No internet connection required • No analytics or tracking • Open source - verify our claims yourself SECURE BY DESIGN • PIN protection with automatic data protection • Optional safety PIN for emergencies • Choose your app icon for discretion Whether you're tracking for health awareness, planning purposes, or personal records, Tarn gives you a simple, private way to understand your patterns without compromising your data. No subscriptions. No ads. No data collection. Just a journal that respects your privacy.
NuanYue
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NuanYue is a simple period tracker with a soft pink, Apple-style look. Everyone in the family keeps their own record. [Record in one tap] · Tap once when your period starts and once when it ends; add missed days later, or tap dates directly on the calendar · The Today ring shows the whole cycle at a glance: period, next expected period, fertile window and ovulation day · Log flow, cramps, symptoms, mood and notes [Automatic estimates] · After two recorded periods, your next period and fertile window are estimated from your own recent cycles · Stats: average cycle, average period length, regularity, cycle-length bars and history [For the whole family] · Each person has their own profile; change the name and avatar any time (emoji or a photo) · 8 color themes, light or dark; each person picks their own · Optional 4-digit passcode so family members cannot see your records [TCM intake form] · Tick items on a Traditional Chinese Medicine intake form, item by item as on the original: cold/heat, sweating, pain, appetite and taste, bowel and bladder, sleep, activity and mood, menstruation and discharge, tongue, pattern of onset · Items ticked under "menstruation and discharge" in a daily record can be carried into the form in one tap · Export as a long image or an A4 PDF (full form, or selected items only); selected items are ticked and marked in red as on the original, ready to send to your doctor [Reminders] · A reminder 1–3 days before your period is due, at the time you choose [Privacy] · No sign-up, no internet access, no data collection; all records stay on your phone Note: the app's interface is currently in Simplified Chinese. Estimates are for reference only and must not be used for contraception or as medical advice; the intake form is only a reference for your doctor and is not a diagnosis.
Screenshots
Verdict
The clearest difference is iOS requirement: Tarn. at 15.1 against NuanYue's 17.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Tarn. | NuanYue |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Daily |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 42 MB | 2 MB |
| Age rating | 4+ | 12+ |
| Developer | suite 110 llc | lei bao |
In-app purchases
Tarn.
No in-app purchases
NuanYue
No in-app purchases









