28X Private Period Tracker vs RTMB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
28X Private Period Tracker
Understand your menstrual cycle with a privacy-focused period tracker. Log moods, symptoms, and gain insights into your body's patterns from first periods to menopause. All your data stays on your device, with no ads or data selling.
- Period and cycle tracking
- Menstrual phase predictions
- Mood, energy, and symptom logging
- Clinically informed women's health content
- Data stored locally on device
- No ads, subscriptions, or data selling
Read full descriptionHide full description
28X Private Period™ is a free-to-use period tracker, privacy safe, designed to create a beautiful space to understand your cycle, from first periods to perimenopause and menopause. Your data stays yours. Always. No selling data. A women's health app built entirely around privacy. Free for everyone, everywhere. Discreet, clinically informed and very private. The first period tracker to achieve a 93% ORCHA rating. Periods are better on 28X. WHY WE’RE DIFFERENT Most period trackers rely on subscriptions, ads, or sharing user data to make money. 28X is the new way to track periods. - No subscriptions. Free for everyone, everywhere. - You have the power over your own data. It stays with you on your device. - No data selling, no data sharing. No cloud servers. - No ads. No subscriptions. No tracking. No paywalls. No locked features. - Calm, simple period tracking designed around privacy. Understand your body without giving up your data. - We build 28X alongside our users, listening to real feedback to shape what people actually want and need from the app. To help keep 28X free for everyone, you can contribute to an optional pay-it-forward feature that supports development and women and girls in vulnerable communities worldwide. No obligation. WHAT’S INSIDE THE APP Simple period tracking tools to help you understand your body. - Track Your Cycle - Period and cycle tracking - Clear menstrual phase predictions - Mood, energy, PMS and symptom logging - Patterns you can actually understand LEARN WOMEN'S HEALTH Supportive, clinically informed content designed to be clear, accessible, and empowering. Learn about: - Hormones and cycle phases - PMS and monthly changes - Endometriosis and PCOS - Perimenopause and menopause - Skin, mood, and energy shifts - Nutrition, lifestyle, contraception, and fertility PRIVACY FIRST - Your data stays with you - All data is stored on your device - No cloud storage - No tracking or profiling - No ads - No selling your data Health tracking built around you, not your data. FOR EVERYONE, EVERYWHERE 28X is free, global, and inclusive, designed for all backgrounds and life stages. Whether you are tracking your first period or navigating menopause, 28X helps you understand your body without giving up your privacy. 28X Private Period™ is not a medical device and doesn’t diagnose, monitor, prevent, treat or predict any health condition. It’s also not designed to help you get pregnant or avoid pregnancy. Always speak to a healthcare professional for personal medical advice.
RTMB
Read full descriptionHide full description
For anyone who wants to track what they're drinking. Monitor your daily intake — whether that's water, coffee, soft drinks or more. Track what matters to you Log drinks from a comprehensive database covering hot drinks, soft drinks, water and more View your drinking history and spot patterns over time Track you daily intake consumed and stay on top of your health goals Optional Social Tracking Create private groups with friends to compare habits View high-level stats across your group Reflect on patterns and results together Build better habits, stay hydrated, and make more informed choices — whatever your drink of choice. Download RTMB and find out more!
Screenshots
Verdict
The clearest difference is in-app purchases: RTMB at none against 28X Private Period Tracker's 1. 28X Private Period Tracker's advantage is update cadence (weekly vs every 3 weeks). On price, ads, device support and iOS requirement 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. 28X Private Period Tracker sells 1 one-off in-app purchase. RTMB asks for nothing beyond the download.
28X Private Period Tracker ships an update weekly, RTMB every 3 weeks. The most recent releases landed on October 17, 2026 and September 27, 2026 respectively.
| Parameter | 28X Private Period Tracker | RTMB |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 100 MB | 41 MB |
| Age rating | 4+ | 12+ |
| Developer | 28x | Toby Challis |
In-app purchases
28X Private Period Tracker
- NEON Butterfly$1.99
RTMB
No in-app purchases
Questions
Is 28X Private Period Tracker free?
Is RTMB free?
Do 28X Private Period Tracker or RTMB have ads?
Which is updated more often, 28X Private Period Tracker or RTMB?
Other comparisons















