Comparison

Calla vs Corpus

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

Head to head
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

About

Corpus

Features
Read full description

Build a record of your physique, one check-in at a time. Corpus brings progress photos, body composition estimates and training context into a history you can return to as your body changes. MAKE YOUR PHOTOS EASIER TO COMPARE Capture guided check-ins and browse your front, side and back photos over time. Compare two check-ins side by side or with a slider. Photo Match checks visual consistency in pose, lighting, distance and framing, helping you spot differences in how the photos were taken before interpreting a change. FOLLOW THE NUMBERS OVER TIME Review estimated body fat percentage, FFMI, a composite score from 0 to 100 and ratings for eight muscle groups. See changes alongside your photos and logged weight. These are estimates for fitness tracking, not clinical measurements or medical advice. Capture conditions can affect the results. KEEP THE STORY BEHIND YOUR PROGRESS Explore your photo history in Backstory and revisit weekly Chapters. Trends bring your check-ins, consistency and progress into view. Set milestones for your goals and follow how you are progressing toward them. ADD CONTEXT FROM YOUR ROUTINE Optionally connect Apple Health to see available sleep, heart rate, activity and workout data alongside recovery and training trends. What appears depends on your permissions and the data recorded by your devices and apps. Photo check-ins work without Apple Health. ASK YOUR AI COACH Discuss your check-ins, muscle ratings, goals and trends with a Coach that uses your recorded context. Bring a question about your progress and explore what deserves a closer look. Start with a baseline, return for your next check-in and build a clearer view of your progress over weeks and months. A Corpus Premium subscription is required to use the app after onboarding. Monthly and yearly plans are available. Prices and any trial eligibility are shown before purchase. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use: https://getcorpus.app/terms Privacy Policy: https://getcorpus.app/privacy

Screenshots

Calla4 screens
Corpus4 screens

Verdict

The call

The clearest difference is update cadence: Corpus at daily against Calla's every 4 days. Calla's advantage is iOS requirement (16.4 vs 26.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calla sells 2 in-app purchases, starting at $7.99 per month and Corpus 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

Calla ships an update every 4 days, Corpus daily. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 4 level
Calla versus Corpus: the parameters behind the verdict, then further details
ParameterCallaCorpus
PriceFreeFree
Update frequencyEvery 4 daysDaily — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS16.4 — better26.0
Further details — not scored
Size69 MB19 MB
Age rating12+12+
DeveloperArman MalkhasyanFelipe Passos

In-app purchases

2 purchases

Calla

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

Corpus

Subscriptions2
  • Corpus Premium Monthly$7.991 Month
  • Corpus Premium Yearly14 Days trial$49.991 Year

Questions

Is Calla free?
Calla is free to download, with in-app purchases available.
Is Corpus free?
Corpus is free to download, with in-app purchases available.
Do Calla or Corpus have ads?
Neither Calla nor Corpus shows ads.
Which is updated more often, Calla or Corpus?
Calla ships an update every 4 days, and Corpus daily. Most recently, Calla was updated on October 2, 2026 and Corpus on October 3, 2026.

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