Comparison

Stardust Period Tracker vs Change Up!

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Stardust Period Tracker

This health app helps you understand and track your menstrual cycle, ovulation, and pregnancy. It combines scientific data with ancient wisdom and astronomy to provide personalized insights and goal manifestation tools. Features include period predictions, symptom tracking, and lunar synchronicity.

Highlights
  • Period and ovulation prediction
  • Pregnancy tracking with AR
  • Daily personalized insights
  • Symptom and mood tracking
  • Lunar cycle synchronization
  • Goal manifestation tools
Features
Read full description

Stardust is a free period, ovulation, and pregnancy tracker that helps you understand your period, hormones, and every phase of your menstrual cycle. We blend science, ancient wisdom, astronomy, and AI to make period tracking feel simple, intuitive, and meaningful. Track your period, log symptoms, follow hormonal changes, and watch your cycle unfold day by day. Stardust is the cycle tracker that turns daily period tracking into real self-understanding. PERIOD TRACKER & CYCLE TRACKER Decode your period and every phase of your menstrual cycle with a period tracker built to feel intuitive. - Predict your next period and spot PMS patterns before they start - Get personal daily insights based on your menstrual cycle and hormone patterns - See predictions for your period, PMS, cravings, moods, and fertility - Get enhanced cycle tracking insights using your sleep and activity data OVULATION TRACKER & TRYING TO CONCEIVE On your TTC journey, use Stardust as your ovulation tracker to predict your fertile window and understand your cycle on a deeper level. - Get ovulation forecasts and fertility awareness to plan pregnancy - Connect wearables like Apple Watch and Oura Ring to track your Basal Body Temperature, or log it manually - Follow how your hormones shift across your menstrual cycle, day by day PREGNANCY TRACKER Pregnancy Mode is Stardust's week-by-week pregnancy tracker. Switch it on to follow your full hormonal journey through pregnancy. - See weekly baby growth, with 3D and AR to view your baby's size right in your belly - Get daily affirmations and symptom tracking throughout pregnancy - Read weekly insights on health, exercise, nutrition, and ancient wisdom - Explore hormone and moon-based insights with zodiac sign matchups between you and your baby SYNC YOUR CYCLE WITH THE MOON Stardust goes beyond a standard period tracker to connect your menstrual cycle to the cosmos. - Use tools for cycle syncing and aligning your menstrual cycle with lunar phases - Explore a moon calendar and zodiac insights with symbolism and folklore mapped to your cycle - Pull a daily card and get readings tuned to your moon, sun, and rising sign, and cycle phase TRACK YOUR CYCLE TOGETHER Invite partners or close friends to stay in sync with your period, TTC journey, or pregnancy. WHO STARDUST IS FOR Stardust is for anyone tracking a period, predicting ovulation on a TTC journey, tracking a pregnancy week by week, following their symptoms and hormones, or wanting a closer connection between their cycle and the moon. PRIVACY AT ITS CORE Founded and led by women, Stardust is a period tracker built with privacy at its core. Your cycle data and menstrual cycle history are protected. We never sell or share your personal health information. PRIVACY POLICY & TERMS OF SERVICE https://stardust.app/privacy-policy https://stardust.app/terms-of-use CONNECT WITH US Web – stardust.app Instagram – @stardust TikTok – @stardust.app Note: Stardust should not be used as birth control or contraception. The app does not substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider. Having technical issues or questions about your cycle? Email support@stardust.app.

About

Change Up!

Features
Read full description

Optimism isn't something you're born with, it's a skill you can build. Change Up! was built on this simple but powerful science backed idea, taking two of the most well-researched optimism boosting techniques in positive psychology and delivering them in a way that's accessible and frictionless. No subscriptions. No lengthy onboarding. Just a clean, calm experience that meets users where they are and gently nudges them toward a healthier mindset. HOW IT WORKS Throughout your day, Change Up! sends you a "Thought Breaker", a gentle, randomised notification that prompts you to pause and complete a short exercise. Rather than demanding a rigid daily routine, this design mirrors how real habit formation works: small, unpredictable moments of reflection that slowly rewire how you respond to the world. No long sessions. No pressure. Just a mindset shift, one thought at a time. BEST POSSIBLE SELF Imagine and write about your ideal future, your relationships, career, health, and personal growth at their very best. This evidence-based technique trains your brain to expect positive outcomes, builds optimism, and increases motivation over time. COGNITIVE REFRAMING Catch a negative thought, examine the evidence for and against it, and replace it with a more balanced perspective. Rooted in Cognitive Behavioural Therapy (CBT), this exercise helps you break unhelpful thinking patterns and respond to challenges with clarity. The interface was designed to feel like a breath of fresh air. An underwater-inspired aesthetic and the unhurried flow of each exercise create a sense of calm before you even begin. Mood tracking is built in so you can see your progress over time and evidence that it is working. We'd love to hear from you as well whatever your experiences with the app may be! Mental wellness is one of the most searched categories on the App Store, yet it is cluttered with complexity and paywalls. Change Up! bucks that trend — focused, free to use, and grounded in science rather than hype. FEATURES - Customise how often and when Thought Breakers arrive each day - Optional guided breathing exercise before each session to help you focus - Track your mood after every exercise and watch your wellbeing trend upward - Review your history — past entries and mood ratings all in one place - Toggle each exercise on or off to suit your needs - Clean, distraction-free design built for calm focus Download Change Up! and start your 3-step journey to optimism today.

Screenshots

Stardust Period Tracker4 screens
Change Up!4 screens

Verdict

The call

The clearest difference is in-app purchases: Change Up! at none against Stardust Period Tracker's 21. Change Up! also leads on ads (none vs shown) and update cadence (every 3 days vs fortnightly). Stardust Period Tracker's advantage is chart position (#43 vs unranked). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Stardust Period Tracker sells 20 in-app purchases, starting at $2.99 per 7 days. Change Up! asks for nothing beyond the download.

UpkeepUpdate frequency

Stardust Period Tracker ships an update fortnightly, Change Up! every 3 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 7 level
Stardust Period Tracker versus Change Up!: the parameters behind the verdict, then further details
ParameterStardust Period TrackerChange Up!
PriceFreeFree
Rating4.8 (120K ratings) — better—
Positive reviews54.8% of reviews—
Number of ratings120K — better—
Update frequencyFortnightlyEvery 3 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#43 — better—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.215.1 — better
Further details — not scored
Size219 MB69 MB
Age rating+124+
DeveloperStardust App LLC (New York)RUI YI YONG

Bugs and requests

Stardust Period Tracker

Reported bugs

5 issues
  • Logging out and losing all user data
  • Inability to update or adjust cycle information
  • Calendar and cycle predictions not syncing correctly
  • Notifications not working as expected
  • Certain features/sections not loading properly

Requested features

6 requests
  • Add more symptom and mood tracking options
  • Implement graph/chart view to visualize cycle data
  • Allow custom notes and reminders
  • Provide more personalized insights and recommendations
  • Improve sync and data backup functionality
Show 1 more
  • Offer more inclusive language and features for diverse users

Change Up!

Not enough reviews yet to summarise bugs or requests.

In-app purchases

20 purchases

Stardust Period Tracker

Subscriptions20
  • All Access$2.997 Days
  • All Access$3.991 Month
  • All Access$4.991 Month
Show 17 more
  • Monthly Plan2 variants$6.991 Month
  • Monthly plan with 7 day trial7 Days trial$6.991 Month
  • All Access$24.991 Year
  • Annual plan with 7-days trial7 Days trial$24.991 Year
  • $24.99/year with 3-days trial3 Days trial$24.991 Year
  • Annual Plan7 Days trial$29.991 Year
  • Annual Plan with 1 month trial1 Month trial$29.991 Year
  • Annual Plan with 3-days trial3 Days trial$29.991 Year
  • Stardust All Access1 Year trial$29.991 Year
  • All Access$39.991 Year
  • Annual Plan with 7-days trial7 Days trial$39.991 Year
  • Stardust All Access1 Year trial$39.991 Year
  • Annual Plan with 3-days trial3 Days trial$39.991 Year
  • Annual plan with 7-days trial7 Days trial$49.991 Year
  • $49.99/year$49.991 Year
  • $89.99/year with 7-day trial7 Days trial$89.991 Year
  • $89.99/year$89.991 Year
None

Change Up!

No in-app purchases

Questions

Is Stardust Period Tracker free?
Stardust Period Tracker is free to download, with in-app purchases available.
Is Change Up! free?
Change Up! is free to download, with no in-app purchases.
Do Stardust Period Tracker or Change Up! have ads?
Stardust Period Tracker shows ads; Change Up! does not.
Which is updated more often, Stardust Period Tracker or Change Up!?
Stardust Period Tracker ships an update fortnightly, and Change Up! every 3 days. Most recently, Stardust Period Tracker was updated on October 31, 2026 and Change Up! on October 25, 2026.

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