Aligner Smile Tracker vs NightCurve
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Aligner Smile Tracker
This app helps users stay consistent with their orthodontic aligner treatment. It tracks wear time, monitors progress with photos, and sends helpful reminders to ensure users achieve their desired smile.
- Track aligner wear time
- Monitor progress photos
- Set wear time reminders
- Receive aligner change notifications
- Create smile transformation videos
- Log daily aligner usage
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Aligner Smile Tracker helps you stay consistent throughout your aligner journey and track your smile transformation with ease. Track your aligner wear time, monitor your treatment progress, set smart reminders, capture progress photos, and preview your future smile with AI, all in one beautifully designed app. Whether you’re using Invisalign®, clear aligners, or retainers, Aligner Smile Tracker gives you the tools to stay motivated, organised, and confident throughout your treatment. FEATURES ALIGNER WEAR TIMER Track your daily aligner wear time, monitor how long your aligners have been out, and stay on schedule for the best treatment results. SMART REMINDERS Get helpful reminders to put your aligners back in and notifications when it’s time to switch to your next aligner. AI SMILE STUDIO Preview your future smile using AI-powered smile simulations and visualise your smile transformation before your treatment is complete. APPLE WATCH SUPPORT Start and stop your aligner timer directly from your wrist and keep track of your progress throughout the day. SIRI HANDS-FREE TRACKING Control your aligner timer using Siri shortcuts without opening the app. WIDGETS & LIVE ACTIVITIES View your progress at a glance from your Home Screen, Lock Screen, and Dynamic Island. PRIVATE ICLOUD BACKUP Securely back up and restore your treatment data using your own private iCloud account. Your information stays under your control. SMILE PROGRESS TRACKING Capture selfies and teeth photos to document your smile journey and compare your transformation over time. GALLERY & PROGRESS VIDEOS Organise your progress photos in one place and create progress videos to watch your smile evolve from start to finish. TREATMENT TIMELINE See how many days remain until your next aligner and track your overall progress toward your perfect smile. DETAILED INSIGHTS Track wear scores, streaks, trends, and progress over time to help build consistent aligner habits. Designed for aligner patients who want to stay consistent, motivated, and excited about their smile journey. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
NightCurve
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Know your night. Own your morning. NightCurve helps you see your drinking clearly — as it happens, and over time — so you can make more mindful choices. For informational and awareness purposes only. Through the night, watch your estimated Hangover Risk and NightCurve score rise and fall live on your Lock Screen and Apple Watch. The morning after — and every day in between — see the bigger picture: which days you drank, which you didn't, and what it all adds up to. KEY FEATURES: • Today's plan: Before you go out, see tomorrow's hangover risk for every drink — then choose where you'll stop. Takes 15 seconds. • Stop alert (free, always): When another drink could tip the night, NightCurve gives you a heads-up on your iPhone, Lock Screen and Apple Watch — in your own words: switch to zero, get home with someone, or call it a night. • Live Hangover Risk: Watch your estimated risk change as your session progresses — a clear nudge to know when to slow down or switch to water. • Nightly Journal: A month calendar of your drinking, day by day. Dry days and drinking days, mapped at a glance. • Alcohol-Free Days: See how many days a month you go alcohol-free — framed as your impact, never a rigid sobriety streak. • Trends & Insights: Weekly and monthly patterns — how much you drink, when, and what you reach for most. • Your Body & Alcohol: Connect Apple Health to see how drinking moves your HRV, resting heart rate and sleep, measured against your own baseline — a single night and the long-term trend. • Alcohol Footprint: Calories from alcohol, hours of fat-burning put on hold, and what a year at this pace adds up to — honest energy equivalents, never weight predictions. • Weekly Report: A Monday recap of your dry days and how your body recovered. • Apple Watch & Live Activities: Log drinks and check your status from your wrist and Lock Screen — discreet and always accessible. • Private by Design: Your data is yours. No accounts, no ads, no third-party servers — with optional private iCloud sync across your own devices. UPGRADE TO NIGHTCURVE PRO Unlock the full picture: complete Journal history and past months, weekly & monthly trends, your body's response via Apple Health (HRV, resting heart rate, sleep), the full Alcohol Footprint, plus Apple Watch and Live Activities. Available via flexible subscriptions. Disclaimer: NightCurve is for informational and awareness purposes only. It is not a medical device and is not approved by any health regulatory authority. Estimates are based on a proprietary composite scoring model and can vary significantly depending on individual factors. Never use this app to determine fitness to drive or operate machinery. If you drank — do not drive. Consult a healthcare professional for medical advice. Terms of Use: https://nightcurve.app/#terms Privacy Policy: https://nightcurve.app/#privacy
Screenshots
Verdict
The clearest difference is iOS requirement: Aligner Smile Tracker at 18.0 against NightCurve's 26.0. On price, update cadence, ads and in-app purchases 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
Both are free to download. Aligner Smile Tracker sells 5 one-off in-app purchases and NightCurve sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Aligner Smile Tracker ships an update every 6 weeks, NightCurve monthly. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.
| Parameter | Aligner Smile Tracker | NightCurve |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 43.8% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Requires iOS | 18.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 74 MB | 10 MB |
| Age rating | 4+ | 17+ |
| Developer | Pocket Pixels LTD | Marcin Kwasniewski |
In-app purchases
Aligner Smile Tracker
- Remove Adverts$1.99
- 3 Credits$2.99
- 10 Credits$8.99
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- 25 Credits$19.99
- Smile Tracker Lifetime$29.99
NightCurve
- Premium Monthly$4.991 Month
- Premium Annual7 Days trial$29.991 Year
- Premium Lifetime$44.99
Questions
Is Aligner Smile Tracker free?
Is NightCurve free?
Do Aligner Smile Tracker or NightCurve have ads?
Which is updated more often, Aligner Smile Tracker or NightCurve?
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