Comparison

Attune vs Calla

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

Head to head
About

Attune

Effortlessly track hot flashes and monitor the impact of hormone therapy. Log symptoms with a single tap on your iPhone or Apple Watch, and visualize changes in your health data over time. Generate comprehensive reports for your doctor.

Highlights
  • One-tap hot flash logging
  • Hormone therapy dose tracking
  • Sleep and heart rate integration
  • Customizable reminders
  • Doctor-ready PDF reports
  • Data export to CSV
Features
Read full description

Track hot flashes in one tap. See what your hormone therapy actually changed. Log hot flashes with one tap — on your iPhone or right from your Apple Watch. Every dose change becomes a line on your charts, so you can see exactly what happened after: fewer hot flashes, better sleep, calmer heart rate. REMINDERS THAT CLOSE THE LOOP Patch days (twice a week, your schedule), daily gel or pills. If you don't mark it done, Attune follows up 45 minutes later. Mark it done right from the notification — no more "did I change it on Thursday?" EVERY MEDICATION ON ITS OWN SCHEDULE Two tablets at once is the normal prescription, not the exception. Each medication keeps its own doses, its own schedule and its own reminders — including cyclical progesterone by day of the month. Nothing is merged, nothing overwrites anything else. THE DOSE LINE Change your patch, gel or pills — Attune marks the date on every chart and compares before with after over 2 weeks, 6 weeks or 3 months, and flags short coverage as preliminary. Not on therapy yet? Start logging now — the "before" period can only be recorded while it is happening. "Hot flashes down 40% since your dose change" is a sentence your doctor can work with. ONE-TAP LOGGING Hot flashes happen anywhere. Tap once on your Apple Watch and it's recorded with the exact time — day and night episodes counted separately. Adjust intensity and triggers later, only if you want. APPLE HEALTH, BUILT IN Attune imports 6 months of sleep and heart history the moment you connect, so your charts mean something from day one. Sleep, resting heart rate and HRV update automatically. A REPORT YOUR DOCTOR TAKES SERIOUSLY A concise PDF: hot flash frequency by week, response to your last dose change, sleep and heart trends. Generate a PDF and walk into your appointment with evidence. WHAT YOU TRACK IS UP TO YOU Add your own symptoms — joint pain, anxiety, palpitations — and rate them 1–5 next to the built-in ones. Log bleeding on any day, or never: there is no cycle setup anywhere in Attune, and it works the same after a hysterectomy. Fix a wrong entry or add a missed one on any past day. YOUR DATA STAYS YOURS No account is required, and your diary and Apple Health readings never leave your device. Export to CSV anytime. Subscription: after a 7-day free trial, at the price shown in your App Store. Payment is charged to your Apple Account. Subscription renews automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel in Settings. Attune is a tracking tool, not a medical device. Always consult your clinician about your therapy. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://attunehrt.pages.dev/privacy

About

Calla

Features
Read full description

Calla is a private perimenopause and menopause tracker for iPhone. Keep a daily diary of symptoms, hot flashes, sleep and hormone replacement therapy (HRT). Calla Pro adds insights and PDF reports for your next medical appointment. MADE FOR THIS STAGE • 25+ symptoms with severity, plus your own custom symptoms and notes • One-tap hot flash log with time of day, night sweats and sleep • Works whether your periods are regular, irregular or gone – including after a hysterectomy or with an IUD • Tracks the gap since your last period and flags bleeding after 12 months HRT, PROPERLY • Patches, gels, sprays, tablets, pessaries, testosterone and more • Daily, twice-weekly, weekly and cyclical schedules with reminders that respect Focus modes • Log dose changes and see how your symptoms compared before and after SEE THE PATTERNS • Calendar heatmap and 7/30/90-day trends • Which triggers (alcohol, caffeine, stress, poor sleep) go with worse days • Adherence vs symptoms, hot flash frequency by time of day BRING PROOF TO YOUR APPOINTMENT • PDF report with charts, your HRT regimen and adherence, bleeding pattern, labs and your questions • Share from the app or print PRIVATE BY DESIGN • No account, no sign-up, no email • Data stays on your iPhone; optional iCloud backup and full export (CSV, JSON, PDF) • Optional Face ID lock • Writes symptoms to Apple Health and imports your cycle history Daily logging, medication reminders and JSON/CSV exports are available without a subscription. Calla Pro unlocks Insights and creation of PDF reports. Calla Pro is available as a subscription: $39.99/year after a 7-day free trial, or $7.99/month. Payment is charged to your Apple ID account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Settings › Apple ID › Subscriptions. Calla is a tracking tool, not a medical device. It does not diagnose or treat conditions. Always talk to your healthcare provider about symptoms and treatment. Privacy Policy: https://callatracker.app/privacy Terms of Use: https://callatracker.app/terms Support: https://callatracker.app/support

Screenshots

Attune4 screens
Calla4 screens

Verdict

The call

The clearest difference is update cadence: Attune at every 2 days against Calla's every 4 days. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Attune sells 2 in-app purchases, starting at $5.99 per month and Calla sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Attune ships an update every 2 days, Calla every 4 days. The most recent releases landed on October 13, 2026 and October 18, 2026 respectively.

Scorecard1 real difference · 9 level
Attune versus Calla: the parameters behind the verdict, then further details
ParameterAttuneCalla
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 days — betterEvery 4 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size6 MB69 MB
Age rating12+12+
DeveloperIlia UsatovArman Malkhasyan

In-app purchases

2 purchases

Attune

Subscriptions2
  • Monthly$5.991 Month
  • Yearly7 Days trial$49.991 Year
2 purchases

Calla

Subscriptions2
  • Calla Pro - Monthly$7.991 Month
  • Calla Pro - Yearly7 Days trial$39.991 Year

Questions

Is Attune free?
Attune is free to download, with in-app purchases available.
Is Calla free?
Calla is free to download, with in-app purchases available.
Do Attune or Calla have ads?
Neither Attune nor Calla shows ads.
Which is updated more often, Attune or Calla?
Attune ships an update every 2 days, and Calla every 4 days. Most recently, Attune was updated on October 13, 2026 and Calla on October 18, 2026.

Other comparisons