Comparison

SmileProgress vs Yevli

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

Head to head
About

SmileProgress

Features
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SmileProgress lets you record and organize photos of your orthodontic journey entirely on your device. Capture, align, anonymize, and compare in one flow — and share anonymously only when you choose to. It is an app for keeping your own record, at your own pace. Main features - Record from the same angle: organize open / closed × front / right / left photos by date - Auto-align: detects the mouth area and matches level, center, and size so Before / After are easy to compare - Easy comparison: pick first vs. latest, 1 month ago, or 3 months ago, and view with a slider, side by side, or time-lapse - Anonymization preview: check the shared image beforehand; EXIF and location data are removed - Sharing you control: sharing always goes through an explicit action and a confirmation screen, so nothing is ever posted automatically - Delete anytime: you can take down a shared post whenever you want Privacy - Original photos are kept only on your device and are never sent to our servers - Only anonymized, adjusted images are used when you share - Whether to share is entirely your choice SmileProgress is not a medical device and is not intended for diagnosis or treatment. It is an app for recording and looking back. Pricing - Browsing posts and sharing anonymously are free - Recording photos is free for 90 days from the day you add your first photo - After that, viewing, comparing, exporting, backing up and sharing what you have already recorded stays free - The one-time purchase is needed only to keep adding new photos Features unlocked by the one-time purchase stay available for good. We plan to add a Pro plan (extra features) in the future, but we will never move one-time features behind a paid plan. Early buyers will receive a benefit when Pro launches.

About

Yevli

Features
Read full description

Yevli is an everyday health tracker that brings your day into one clear view: last night's sleep and today's steps from Apple Health, alongside the water, mood, cycle, medications and goals you log yourself. ONE CLEAR DAILY VIEW • See last night's sleep, including Core, Deep and REM stages when your device records them • See today's steps and how many workouts Apple Health recorded today • Set daily goals for water, steps, mood and gym check-ins, and see your progress at a glance TRACK THE LITTLE THINGS • Log water by the bottle: set your bottle size once, then add full bottles in a tap • Check in on your mood and see it on a monthly calendar • Record your weight • Log period dates, flow and notes, with a calendar and history • Keep a medication list, mark each one as taken, and turn on one general 9:00 AM reminder • Note sick days • Quick Log keeps every entry one tap away APPLE HEALTH, ON YOUR TERMS Connecting Apple Health is optional. Yevli shows your sleep, steps and workouts only after you allow access, and can save the water and weight you log to Apple Health with your permission. If you decline, Yevli still works with your own entries. PRIVATE BY DESIGN • Free features work without an account • Your detailed logs stay on your iPhone • Lock Screen notifications use general wording and never show medication names or cycle details • Photos used for scanning are read on your device and are not uploaded or kept YEVLI PLUS An optional subscription with extra tracking tools: • Nutrition label scanning: read the printed values on your iPhone, confirm them, and track daily calories, protein, carbs, fat and sodium • Body composition reports: read your InBody result sheet on your iPhone, confirm the values, and compare them with your own history and the previous month • Gym planning: set weekly training days, check in, and log exercises with sets, reps and weight • Cycle forecasts: after you log at least two periods, see estimated upcoming start dates and get a discreet reminder one or three days before • More reminders: a separate time for each medication, water check-ins and a wind-down reminder • Home Screen and Lock Screen widgets for today's goals and water • A customizable Today screen: choose up to eight cards and reorder them • Doctor-visit dates Plus reminders require Sign in with Apple. APPLE WATCH See today's steps, add water and check in at the gym from your wrist. If your Watch is offline, entries are saved and sent to your iPhone later. Yevli is available in English and Traditional Chinese on iPhone and iPad. Yevli is for general wellness and personal organization. It does not diagnose, treat or prevent any condition and is not a substitute for professional medical advice. Cycle estimates are not a form of contraception. Yevli Plus is an auto-renewable subscription, available monthly or yearly. Eligible accounts can start the yearly plan with a 7-day free trial. Prices are shown in the App Store before purchase. Payment is charged to your Apple Account, and the subscription renews automatically unless canceled at least 24 hours before the end of the current period in your Apple Account settings. Privacy Policy: https://yevli-kynelabs.zeabur.app/yevli/privacy/ Terms of Use: https://yevli-kynelabs.zeabur.app/yevli/terms/

Screenshots

SmileProgress4 screens
Yevli4 screens

Verdict

The call

The clearest difference is update cadence: Yevli at every 5 days against SmileProgress's every 3 weeks. Yevli 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 · 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. SmileProgress sells 1 one-off in-app purchase and Yevli sells 5 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SmileProgress ships an update every 3 weeks, Yevli every 5 days. Both last shipped on October 24, 2026.

Scorecard2 real differences · 4 level
SmileProgress versus Yevli: the parameters behind the verdict, then further details
ParameterSmileProgressYevli
PriceFreeFree
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.6 — better18.0
Further details — not scored
Size37 MB11 MB
Age rating4+12+
DeveloperNaoki MORIXuan-Yu Teng

In-app purchases

1 purchases

SmileProgress

One-time1
  • Keep Recording (one-time)$0.99
5 purchases

Yevli

Subscriptions2
  • Yevli Plus Monthly$4.991 Month
  • Yevli Plus Annual7 Days trial$39.991 Year
One-time3
  • Yevli Plus Promo — 1 Month$0.29
  • Yevli Plus Promo — 6 Months$0.29
  • Yevli Plus Lifetime$59.99

Questions

Is SmileProgress free?
SmileProgress is free to download, with in-app purchases available.
Is Yevli free?
Yevli is free to download, with in-app purchases available.
Do SmileProgress or Yevli have ads?
Neither SmileProgress nor Yevli shows ads.
Which is updated more often, SmileProgress or Yevli?
SmileProgress ships an update every 3 weeks, and Yevli every 5 days. Most recently, SmileProgress was updated on October 24, 2026 and Yevli on October 24, 2026.

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