Comparison

Day One 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

Day One

Features
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Day One: Future Self helps you become the person you want to be. Set meaningful goals, visualize your future, and create daily routines that support real personal growth. The app combines reflection, motivation, and structure in one focused experience. Features: โ€ข Set and track personal goals โ€ข Create a vision board for your future self โ€ข Build daily rituals and journal entries โ€ข Stay inspired with motivating quotes โ€ข Celebrate progress and stay consistent Whether you want more clarity, stronger habits, or a better sense of direction, Day One: Future Self gives you the tools to grow every day. Start today and take the first step toward your future self. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Aster

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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

Day One4 screens
Aster4 screens

Verdict

The call

The clearest difference is update cadence: Day One at weekly against Aster's every 3 weeks. On price, ads, in-app purchases and device support 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. Day One sells 1 in-app purchase, starting at $9.99 per month and Aster sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Day One ships an update weekly, Aster every 3 weeks. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

Scorecard1 real difference ยท 5 level
Day One versus Aster: the parameters behind the verdict, then further details
ParameterDay OneAster
PriceFreeFree
Update frequencyWeekly โ€” betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS17.617.0 โ€” better
Further details โ€” not scored
Size86 MB2 MB
Age rating4+12+
DeveloperFlorian BeerGradatim Pty Ltd

In-app purchases

1 purchases

Day One

Subscriptions1
  • Day One Premium$9.991 Month
2 purchases

Aster

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

Questions

Is Day One free?
Day One is free to download, with in-app purchases available.
Is Aster free?
Aster is free to download, with in-app purchases available.
Do Day One or Aster have ads?
Neither Day One nor Aster shows ads.
Which is updated more often, Day One or Aster?
Day One ships an update weekly, and Aster every 3 weeks. Most recently, Day One was updated on October 15, 2026 and Aster on October 24, 2026.

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