Comparison

HormoneSync vs Aster

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

Head to head
About

HormoneSync

Features
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Track perimenopause and menopause symptoms, HRT doses, and cycle changes in one place โ€” then generate a doctor-ready PDF report before every appointment. WHY HORMONESYNC Most symptom trackers stop at logging. HormoneSync connects the dots: which hot flashes line up with which HRT dose, which nights of poor sleep follow which cycle day โ€” so you walk into your appointment with answers, not just data. TRACK - Hot flashes, night sweats, mood, sleep quality, brain fog (0-5 severity) - HRT and supplement doses, with type and amount - Period and spotting days through the perimenopause transition UNDERSTAND - 14-day trend charts per symptom - Automatic "most frequent symptom" summary SHARE - One-tap PDF health report - symptom averages, peak severity, cycle days, and full medication log for the last 30 days PRIVATE BY DESIGN Your data stays on your device unless you choose to export or share it. HormoneSync+ unlocks unlimited history, Apple Health sync, and unlimited PDF reports.

About

Aster

Read full description

You know your pain is real. Aster helps you prove it. People with endometriosis wait years for a diagnosis โ€” and those who feel dismissed by their doctors wait longest. What finally gets someone believed usually isn't a number. It's being able to say what the pain feels like, and what it stopped them doing. Aster records all three. HOW BAD, WHAT KIND, WHAT IT COST A 0โ€“10 scale for intensity. Pain character โ€” cramping, labour-like, burning, squeezing, stabbing, dragging, nerve-like. And how much the episode disrupted your day, from barely to couldn't get out of bed. LOG A FLARE IN SECONDS Built for your worst days: big tappable targets, one-tap symptom and location chips, no typing required. Log from the app, your Lock Screen, or a Home Screen widget. Choose which symptoms appear on your log screen so it stays fast. TRACK WHAT ACTUALLY HAPPENS TO YOU Twenty-three symptoms across thirteen pain locations. Cramps, bloating and endo belly, fatigue, brain fog, nausea, clotting, heavy bleeding, spotting, constipation and diarrhoea tracked separately, bladder urgency and leaking, pain with sex, headache, lightheadedness, mood changes and more โ€” across pelvic, abdominal, lower back, hip, thigh, leg and bowel locations. A REPORT DOCTORS TAKE SERIOUSLY Generate a clean one-page PDF designed around what a clinician needs: average and peak pain, flare days per month, your most frequent symptoms, how pain lines up with your cycle, what it's costing you day to day, and the treatments you've tried. Timestamped, structured, and hard to wave away. SEE YOUR PATTERNS Charts show pain over time, symptom frequency, and how symptoms line up with your cycle โ€” so you spot the patterns before your specialist asks. COMPLETELY PRIVATE No account. No cloud. No tracking. Everything stays on your device, protected by Face ID if you choose. We can't see your data โ€” we built it that way on purpose. FREE VS PREMIUM Logging, cycle tracking, reminders, basic trends and the basic doctor report are free โ€” forever. Premium ($3.99/month or $29.99/year, 1-month free trial) adds cycle-day and phase analysis, custom report ranges, medication effectiveness insights, appointment reminders and unlimited history export. Aster is a symptom record, not medical advice, and it doesn't diagnose anything โ€” only a clinician can do that. Your pain deserves to be on the record, and taken seriously. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HormoneSync4 screens
Aster4 screens

Verdict

The call

The clearest difference is in-app purchases: HormoneSync at none against Aster's 2. HormoneSync also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price and ads there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Aster sells 2 in-app purchases, starting at $3.99 per month. HormoneSync asks for nothing beyond the download.

Scorecard3 real differences ยท 3 level
HormoneSync versus Aster: the parameters behind the verdict, then further details
ParameterHormoneSyncAster
PriceFreeFree
Update frequencyโ€”Every 3 weeks
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS15.1 โ€” better17.0
Further details โ€” not scored
Size31 MB2 MB
Age rating4+12+
DeveloperTolga ErdemGradatim Pty Ltd

In-app purchases

None

HormoneSync

No in-app purchases

2 purchases

Aster

Subscriptions2
  • Aster Premium Monthly7 Days trial$3.991 Month
  • Aster Premium Yearly7 Days trial$29.991 Year

Questions

Is HormoneSync free?
HormoneSync is free to download, with no in-app purchases.
Is Aster free?
Aster is free to download, with in-app purchases available.
Do HormoneSync or Aster have ads?
Neither HormoneSync nor Aster shows ads.

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