Sleepwizard vs Nightpenny
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Sleepwizard
This app uses AI to analyze your sleep patterns by combining Apple Watch biometrics with your daily context. It provides personalized insights into why your sleep quality fluctuates and offers actionable advice to improve it.
- AI-driven sleep pattern analysis
- Integrates Apple Watch biometrics
- Contextual logging (caffeine, stress, etc.)
- Personalized sleep debt tracking
- Smart bedtime recommendations
- Detailed sleep trends and vitals
Read full descriptionHide full description
SleepWizard โ Your AI Sleep Coach Sleep trackers tell you what happened. SleepWizard tells you why. Most apps show you data: "You slept 6 hours." But they can't tell you why your deep sleep tanked or what to do about it. SleepWizard is different. It combines your Apple Watch biometrics with the context only you can provide โ caffeine, alcohol, stress, screens, exercise โ and uses AI to find patterns over weeks that you'd never spot yourself. The result? Insights like: "Your deep sleep drops 40% on nights you log alcohol after 7pm. This has happened 7 of the last 8 times." That's not generic advice. That's YOUR data telling YOUR story. WHAT MAKES SLEEPWIZARD DIFFERENT Data Fusion โ Apple Watch captures sleep stages, HRV, heart rate, SpO2. You log the context: caffeine, alcohol, stress, screens, exercise. Somni (your AI coach) connects them over time. AI Coach That Actually Knows You โ Somni analyzes 7 nights of detailed metrics, 30-day averages, and 7 days of contextual factors. Over 200 data points inform every response. Sleep Debt Tracking โ 14-night rolling ledger shows exactly what you owe. Choose gradual (+15 min/night), moderate (+30 min), or aggressive (+45 min) payback plans. Smart Scheduling โ Optimal bedtime recommendations based on your debt, chronotype, and goals. Quick Check-Ins โ Evening: log substances, stress, screens, exercise in seconds. Morning: rate your mood and energy. Takes 30 seconds. Trends & Vitals โ Track duration, efficiency, quality score, sleep stages, HR, HRV, respiratory rate, and SpO2 over 7/30/90 days. MEET SOMNI Somni is your AI sleep coach. Not a chatbot with a sleep FAQ โ a coach that correlates your biometrics with your behaviors to find YOUR patterns and give YOU specific advice. Ask anything: "Why did I sleep badly last night?" "What's hurting my deep sleep?" "How do I pay back my sleep debt?" Somni uses your own API key from Anthropic (Claude) or OpenAI (ChatGPT). You choose your provider, you control your data. REQUIREMENTS iPhone with iOS 17+ Apple Watch with watchOS 10+ (for sleep tracking) Optional: Your own Claude or ChatGPT API key for AI coaching PRIVACY FIRST All sleep data stays on your device No account required No cloud uploads AI conversations go directly to your chosen provider โ we never see them HealthKit data is never sold or shared SUBSCRIPTION INFORMATION SleepWizard Premium unlocks all features including sleep tracking, sleep debt management, AI coaching, smart scheduling, contextual check-ins, advanced trends, and data export. Annual: $29.99/year ($2.50/month) โ includes 14-day free trial Monthly: $3.99/month Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period at the rate of your selected plan. You can manage and cancel your subscription in your App Store account settings. Any unused portion of a free trial period will be forfeited when you purchase a subscription. Terms of Service: https://sleepwizard.app/terms Privacy Policy: https://sleepwizard.app/privacy GET YOUR SLEEP TOGETHER Download SleepWizard and start your 14-day free trial. No credit card required to start.
Nightpenny
Read full descriptionHide full description
Your sleep is a running balance. Good nights deposit, short nights withdraw. Pennie, a warm copper piggy bank, shows where you stand and walks you through a quiet weekly ritual to catch back up. No hustle. No optimization. No shame. Just a quiet weekly ritual and a number that tells you where you stand. FROM A NIGHT'S SLEEP TO A SUNDAY HABIT โข PASSIVE TRACKING Pennie reads sleep from Apple Health. You sleep, we count. No extra hardware, no fiddly logging. โข A RUNNING 14-NIGHT BALANCE A signature 270ยฐ gauge shows your balance: hours owed, hours banked. Updated every morning. โข THE SUNDAY RITUAL Three quiet minutes every Sunday. A statement of the week, one line from Pennie, and a repayment plan you actually want to follow. โข REPAYMENT PLAN, ON YOUR PACE Pick Gentle (+30 min/night), Steady (+1 hour), or Ambitious (+1.5 hours). Bedtime events sync to Apple Calendar in one tap. โข FORECAST WITHOUT THE FEAR See the next 30 nights at your current pace, plus a typical-dip heatmap of where your energy historically wobbles. Patterns, never predictions. โข APPLE WATCH + WIDGETS Six widget families: small, medium, large, lock-screen circle, rectangle, inline. A wrist app and complications that keep your balance one flick away. โข WEEKLY SHARE CARD Tap the gauge on Sunday to export a five-second vertical clip of your week. Strava-grade restraint. Share Pennie without sharing numbers you'd rather keep. WHAT WE'RE NOT Not a medical device. Nightpenny does not diagnose, treat, or prevent any condition. Not a pressure cooker. No streaks to break. No red alerts. Debt is a number, not a character flaw. Not a data broker. Sleep stays on your phone. No server, no ads, no data sold. Analytics is opt-in and never carries numeric sleep values. THE SCIENCE, QUIETLY Balance is computed using a 14-night rolling sum (Van Dongen et al. 2003), with surplus above 1h discounted at 40% (recovery is slower than accumulation, per the Sleep Foundation), and clamped at โ8 hours. Full methodology lives inside the app, in Settings โ About. PRICING Free โข Current balance + last 7 nights โข Pennie's daily greeting Premium โข Full 14-night ledger โข The Sunday Ritual + Calendar sync โข Repayment Plan + 30-night Forecast โข All six widgets, share card, Apple Watch app โข Rich notifications and the full Pennie speech library $6.99 / month (billed today, no trial) $59.99 / year (14-day free trial, save 30%) Built by Foxtaming, an indie studio of one. Questions, weather reports, or sleep stories: contact@nightpenny.com. Terms of Use (EULA): https://nightpenny.com/terms ยท Privacy: https://nightpenny.com/privacy
Screenshots
Verdict
The clearest difference is update cadence: Sleepwizard at every 4 days against Nightpenny's every 4 weeks. Nightpenny's advantage is iOS requirement (17.0 vs 26.2). 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
Both are free to download. Sleepwizard sells 6 in-app purchases, starting at $1.99 per month and Nightpenny sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Sleepwizard ships an update every 4 days, Nightpenny every 4 weeks. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.
| Parameter | Sleepwizard | Nightpenny |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | โ |
| Update frequency | Every 4 days โ better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | โ |
| Devices | iPhone | iPhone, Apple Watch โ better |
| Requires iOS | 26.2 | 17.0 โ better |
| Further details โ not scored | ||
| Size | 18 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | JOSEPH PETEUL | Thomas Sobstyl |
In-app purchases
Sleepwizard
- Lapwizard tracking$1.991 Month
- SleepWizard Premium$3.991 Month
- Sleepwizard Premium$6.991 Month
Show 3 moreShow fewer
- Sleepwizard tracking14 Days trial$14.991 Year
- SleepWizard Premium14 Days trial$29.991 Year
- Sleepwizard Premium14 Days trial$49.991 Year
Nightpenny
- Monthly Premium$3.991 Month
- Annual Premium14 Days trial$34.991 Year









