Comparison

Comma vs Celsia

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

Head to head
About

Comma

Features
Read full description

Comma: Privacy First Period Tracking We built Comma after seeing a constant stream of news about privacy breaches. We believe that period tracking apps are useful tools, and that you should be able to trust them not to pass around your most sensitive data. Why is Comma different to other period apps? - We built Comma from the ground up with privacy in mind. We don't analyze our users, track any data, or give sensitive information to third parties. Even when accepting payments, we make sure to handle them through secure means. - No rough edges - Comma has a cozy theming and is simple to use - Early warnings - Comma calculates when your next period is expected to arrive, and notifies you beforehand so that you can be prepared - Cozy design - our icon packs add a more personalized feeling What are some key Comma features - Symptom prediction: We have a system which analyzes your past cycles and predicts what you are likely to experience in the days leading up to, and throughout your period - Early warning notifications: we have notifications to give you early warning on when we predict your next period will start so that you aren’t caught unaware - Custom symptoms: track things that matter to you that may not traditionally be covered - Cute icon packs: Have a more comfortable experience with a lighter feeling logger - Data exports: Share your cycle information quickly with your healthcare provider, or analyze it yourself What makes Comma the best period app for you? - If you want to keep your information super private, this is the app for you - If you want something with a more human than clinical feeling, then we've got you covered - If you want something built by a small trustworthy team rather than a big corporation, then get downloading! We offer a Comma Plus Subscription! Comma Plus unlocks enhanced features to personalize your health tracking experience: - Access to exclusive monster and plant icon packs - Create and manage custom symptom tracking categories https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms: https://whiostudios.com/comma-terms

About

Celsia

Track perimenopause symptoms and hormone replacement therapy with this app. It syncs with Apple Health to log sleep and heart rate data, and generates a concise report for your doctor. Log symptoms and treatments easily from your iPhone or Apple Watch.

Highlights
  • Syncs with Apple Health for sleep and heart rate data
  • Log over 20 symptoms with one tap
  • Generate one-page provider reports
  • Track hormone replacement therapy doses and changes
  • View trends and patterns over time
  • Log from Lock Screen, Control Center, Siri, and Apple Watch
Features
Read full description

Celsia is a perimenopause and HRT tracker for iPhone and Apple Watch. It reads what your Watch already records, keeps a log of your symptoms and treatments, and makes a one-page report your provider can read in thirty seconds. YOUR NIGHTS, WITHOUT TYPING With your permission, Celsia reads sleep, heart rate variability, resting and overnight heart rate, and wrist temperature from Apple Health, and compares each night with your own usual range, never with anyone else’s. Each morning, Today sums up last night in a sentence and marks anything outside your usual. On iOS 27, Celsia reads the stage you set in Apple Health, and symptoms you log there count too. ONE TAP TO LOG Log a hot flash, night sweats or any of more than 20 symptoms with one tap, and hold a symptom to set how strong it was and when. Log from the Lock Screen, Control Center, Siri or your Apple Watch without opening the app. The symptoms and bleeding you log also go to Apple Health wherever it has a matching type, and what you’ve already logged in Apple Health counts too. If you still have periods, log bleeding and spotting and see the days since your last bleed, with no predictions. EVERY FORM OF THERAPY Estrogen patches, gels, sprays and tablets, progesterone, vaginal estrogen, rings, IUDs, testosterone, non-hormonal treatments, and your own entries. Reminders understand twice-weekly patches and cyclical progesterone, suggest the next patch site, and arrive as time-sensitive notifications with Taken, Snooze and Skip. Your next dose can also wait on the Lock Screen. Every dose change is marked on your timeline. A REPORT FOR YOUR APPOINTMENT One tap makes a PDF on your iPhone: your current therapy and how often you took it, symptoms per week, your nights against your usual, what changed after your latest dose change, bleeding, and the questions you want to ask. Share it, print it or save it. With Celsia Pro (in-app purchase), it adds pages with every symptom, dose and note. Add the date of your next appointment and Celsia can remind you the evening before. TRENDS AND PATTERNS Trends show the last four weeks of your nights and symptoms against your usual range, and what changed after your latest dose change. With Celsia Pro (in-app purchase): twelve weeks to a year, every earlier dose change, and pattern cards that show when symptoms line up with your nights, your cycle or your therapy, each with its numbers and a “Why am I seeing this?” note. PRIVATE BY DESIGN No account and no sign-in. No analytics, no ads, no tracking and no third-party SDKs. Apple Health data never leaves this iPhone. Nothing is sent to us. Export what you’ve entered, or delete everything, at any time. CELSIA PRO, AN OPTIONAL IN-APP PURCHASE Celsia Pro is an auto-renewing subscription sold as an in-app purchase: $39.99 a year with a 14-day free trial, or $6.99 a month. Pro adds the full report with a day-by-day grid, unlimited report history, trends past four weeks, every earlier dose change, pattern cards, and your choice of device for sleep and heart rate variability. Logging, the therapy log, reminders, widgets, the Apple Watch app, the one-page report, what changed after your latest dose change, and exporting everything you’ve entered are free. Payment is charged to your Apple Account when you confirm the purchase, or when the free trial ends. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period, and your account is charged for the renewal within the 24 hours before the period ends. Manage or cancel it in Settings › Apple Account › Subscriptions. Terms of Use (Apple’s standard license agreement): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://apexmade.ai/apps/celsia/privacy/ NOT MEDICAL ADVICE Celsia keeps a record and describes patterns in it. It does not diagnose, and it does not recommend treatments or doses. Decisions about your care belong to you and your provider.

Screenshots

Comma3 screens
Celsia4 screens

Verdict

The call

The clearest difference is iOS requirement: Comma at 18.2 against Celsia's 26.0. On price, update cadence, ads and in-app purchases 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. Comma sells 3 in-app purchases, starting at $1.99 per month and Celsia sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Comma ships an update fortnightly, Celsia every 3 weeks. The most recent releases landed on October 16, 2026 and October 29, 2026 respectively.

Scorecard1 real difference · 8 level
Comma versus Celsia: the parameters behind the verdict, then further details
ParameterCommaCelsia
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS18.2 — better26.0
Further details — not scored
Size53 MB31 MB
Age rating12+17+
DeveloperWhio Studios Pty LtdApex Made, LLC

In-app purchases

3 purchases

Comma

Subscriptions2
  • Plus Monthly3 Days trial$1.991 Month
  • Plus Annual3 Days trial$12.991 Year
One-time1
  • Plus Lifetime$19.99
2 purchases

Celsia

Subscriptions2
  • Celsia Pro, monthly$6.991 Month
  • Celsia Pro, annual14 Days trial$39.991 Year

Questions

Is Comma free?
Comma is free to download, with in-app purchases available.
Is Celsia free?
Celsia is free to download, with in-app purchases available.
Do Comma or Celsia have ads?
Neither Comma nor Celsia shows ads.
Which is updated more often, Comma or Celsia?
Comma ships an update fortnightly, and Celsia every 3 weeks. Most recently, Comma was updated on October 16, 2026 and Celsia on October 29, 2026.

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