Comparison

Smile Scan vs Aligner Diary

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

Head to head
About

Smile Scan

Features
Read full description

See how your smile is actually moving. Take a frontal and side photo, and AI scores your alignment, tells you if you are on track, and flags spacing, midline and bite. FEATURES β€’ AI Smile Scan β€” a frontal and side photo returns an instant alignment score, an on-track status, and written feedback on spacing, midline and bite β€’ Progress Stats β€” overall progress, completed sets, days to your next change and estimated end date in one dashboard β€’ Wear Timer β€” start and stop sessions, with daily and weekly totals against your own hourly goal β€’ Reminders & Notes β€” notes with repeat days and reminder times for tray changes, checkups and appointments β€’ Calendar & Agenda β€” wear history, notes and upcoming changes in a single view β€’ Wear Streaks β€” badges that keep you consistent through the whole treatment Works with clear aligners, retainers and braces. Not a substitute for professional dental or orthodontic advice. Privacy Policy: https://originhub.app/privacy-policy Terms of Use: https://originhub.app/terms-and-conditions

About

Aligner Diary

Features
Read full description

Aligner Diary is a private personal tracker designed to make clear-aligner routines easier to follow and treatment progress easier to review. WEAR TIME AT A GLANCE Record when your aligners go in or come out. The app totals today’s wear and time-out periods and shows how much time remains within your daily goal. CLEAR TRAY-CYCLE PLANNING Set your current tray, total number of trays and change interval. See your current stage, goal streak and next planned tray change from the Today and Progress screens. PHOTO PROGRESS JOURNAL Add teeth photos from the camera or photo library and revisit them by date, so small changes are easier to notice over time. CHECK-INS AND TRENDS Log soreness, fit, attachment concerns, aligner damage, sharp edges and gum bleeding. Trend views help you organize recent observations and decide what to discuss with your dentist or orthodontist. CALENDAR AND EDITABLE HISTORY Use the calendar to review daily wear, photos and check-ins. Edit or delete entries whenever something was recorded incorrectly. REMINDERS, THEMES AND TWO LANGUAGES Use optional wear and tray-change reminders, choose from multiple interface themes, and switch between Simplified Chinese and English. ALIGNER DIARY PRO Optional Pro access adds dentist-ready PDFs, shareable photo comparison cards, advanced reminders and a device privacy lock. Choose monthly, annual or lifetime access and restore eligible Apple purchases. ACCOUNT, PRIVACY AND LOCAL DATA Core aligner records and teeth photos stay on your device. No registration is required to buy or restore Pro through Apple. An optional account can sync membership entitlement; any account can be permanently deleted in the app. Export, preview and restore local backups at any time. Aligner Diary is for personal tracking only. It does not provide medical diagnosis, treatment advice or emergency services. Contact a dentist or orthodontist about persistent pain, damaged aligners, poor fit or other health concerns. Terms of Use: https://alignerdiary.com/terms Privacy Policy: https://alignerdiary.com/privacy Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Smile Scan4 screens
Aligner Diary4 screens

Verdict

The call

The clearest difference is update cadence: Aligner Diary at weekly against Smile Scan's every 2 months. Aligner Diary also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Smile Scan sells 3 in-app purchases, starting at $4.99 per 7 days and Aligner Diary sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Smile Scan ships an update every 2 months, Aligner Diary weekly. Both last shipped on October 31, 2026.

Scorecard2 real differences Β· 4 level
Smile Scan versus Aligner Diary: the parameters behind the verdict, then further details
ParameterSmile ScanAligner Diary
PriceFreeFree
Update frequencyEvery 2 monthsWeekly β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, iPod β€” better
Requires iOS16.415.0 β€” better
Further details β€” not scored
Size87 MB47 MB
Age rating12+4+
DeveloperFatih Erdogan思佳 李

In-app purchases

3 purchases

Smile Scan

Subscriptions3
  • Weekly$4.997 Days
  • Monthly$8.991 Month
  • Annual$17.991 Year
3 purchases

Aligner Diary

Subscriptions2
  • Pro Monthly$0.991 Month
  • Pro Annual$3.991 Year
One-time1
  • Pro Lifetime$7.99

Questions

Is Smile Scan free?
Smile Scan is free to download, with in-app purchases available.
Is Aligner Diary free?
Aligner Diary is free to download, with in-app purchases available.
Do Smile Scan or Aligner Diary have ads?
Neither Smile Scan nor Aligner Diary shows ads.
Which is updated more often, Smile Scan or Aligner Diary?
Smile Scan ships an update every 2 months, and Aligner Diary weekly. Most recently, Smile Scan was updated on October 31, 2026 and Aligner Diary on October 31, 2026.

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