Muse Fit vs Letterly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Muse Fit
Track your fitness, sleep, glucose levels, and mindfulness with smart wearables. Get personalized insights and actionable tips to achieve your wellness goals. Seamlessly sync data from your Muse Hybrid Watch, GTag, and Ring One for a comprehensive health overview.
- Activity tracking with step goals
- Sleep quality monitoring
- Real-time glucose insights
- Strain and stress monitoring
- Mindfulness and relaxation tracking
- Smart notifications and customizable controls
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Achieve your wellness and fitness goals with the Muse device suite: the Muse Hybrid Watch, GTag, and, Ring One. Paired with the Muse app, these devices deliver essential health insights and real-time tracking to elevate your journey. Muse Ring One • The world’s most stylish and comfortable smart ring, designed for advanced wellness tracking. • Strain Goal & workouts: Receive a daily strain goal to help optimize your activity. Start workouts directly from the app, and get detailed metrics at the end. • Strain & Stress Monitoring: Track daily strain and stress levels for balance and resilience. • Vital Health Metrics: Monitor essential vitals to stay proactive about your wellness. • Mindfulness & Relaxation: Track the impact of relaxation sessions to support stress reduction and mental clarity. Muse Hybrid Watch: • Stay active, connected, and informed with the Muse Hybrid Watch on your wrist. • Activity Tracking: Set step goals, monitor movement intensity, and sync your activity data to the Muse app. Receive your Activity Score with actionable tips to boost your lifestyle. • Sleep Monitoring: Track your sleep quality, view your Sleep Score, and get guidance to improve your rest based on personalized data. • Smart Notifications: Get alarms, reminders, and caller IDs directly on your watch, and reduce distractions with customizable focus modes. • Customizable Controls: Personalize button functions to access music, photos, Find My Phone, SOS, and more, all with a single tap. Muse GTag • Take charge of your nutrition and energy with continuous glucose monitoring that adapts to your lifestyle. • Real-Time Glucose Insights: Monitor how different foods affect your glucose levels to make better dietary choices. • Lifestyle Logging: Log meals and activities in the Muse app to understand how your daily habits impact your metabolic health. • Informed Feedback: View glucose insights that empower you to make meaningful changes to support sustained energy and optimal health. Seamless Integration with the Muse App Sync all your Muse devices with the Muse app for a unified view of your health. Whether tracking activity, glucose levels, sleep quality, or mindfulness, the app offers valuable insights to guide you toward your wellness goals. Email: support@musewearables.com
Letterly
Instantly transform your speech into polished text for notes, messages, social media, and more. Organize with custom tags, use offline, and choose from over 25 rewrite styles. Supports over 90 languages and syncs across all your devices.
- Speech to text transcription
- Customizable text rewriting
- Note organization with tags
- Offline recording
- Multi-language support
- Cross-device syncing
- Audio file upload transcription
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Turn your speech into brilliant text – instantly. Write anything, anytime. Perfect for notes, messages, emails, meeting summaries, journal entries, social media posts, and much more. Find your own unique use case! HOW IT WORKS This isn’t just a transcription tool. Just record any speech, and get polished, ready-to-use text immediately. USE CASES - Note-taking: ideas, to-dos, shopping lists, plans - Communication: messages, emails, comments - Content creation: social media posts, articles, newsletters, scripts - Journaling: thoughts, emotions, memories, gratitude - Meetings: summaries, minutes, action plans USEFUL FEATURES - Tags: organize notes with custom tags for easy navigation - Offline mode: capture thoughts anytime, even without internet - Any device: iPhone, Web, Mac, or iPad – notes stay synced across all platforms - Rewrite options: choose from 25+ premade rewrite styles or create your own - 90+ languages: speak freely – language is detected automatically - Widget: start recording instantly from your home screen - Translate: convert voice notes to any language in seconds - Quick sharing: send your text anywhere via Share button or integrations like Zapier - Audio upload: transcribe recordings made outside the app - Long recordings: record up to 90 minutes per note with unlimited recordings Download and try it today! We’ve designed the app to be simple, intuitive, and perfect for daily use. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is review sentiment: Letterly at 78% against Muse Fit's 35%. Letterly also leads on ratings volume (1.1K vs 7) and rating (4.7 vs 4.4). Muse Fit's advantage is in-app purchases (none vs 9). On price, update cadence, ads 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
Both are free to download. Letterly sells 9 in-app purchases, starting at $19.99 per month. Muse Fit asks for nothing beyond the download.
Letterly holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Letterly has 1.1K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 35% of Muse Fit's written reviews are positive against 78% of Letterly's.
Muse Fit ships an update every 2 weeks, Letterly every 10 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | Muse Fit | Letterly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) | 4.7 (1.1K ratings) — better |
| Positive reviews | 35.0% of reviews | 78.1% of reviews — better |
| Number of ratings | 7 | 1.1K — better |
| Update frequency | Every 2 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 100 MB | 95 MB |
| Age rating | 17+ | 4+ |
| Developer | Conzumex Industries Pvt Ltd | Anton Lebedev |
Customer experience
Muse Fit
Letterly
User reviews
Muse Fit
From 7 App Store ratingsWhat we love
- 👍 User-friendly app interface
- 💡 Impressive health tracking insights
- 🌟 Outstanding customer support
- 🚀 Seamless syncing with devices
- ✨ Comfortable to wear daily
Room to improve
- 🐛 Won't download OTP
- 🐛 Bugs and growing pains
- 🐛 Ring doesn't work
- 🐛 Not recording workouts or sleep data
- 🐛 Won't charge
Letterly
From 1.1K App Store ratingsWhat we love
- 🚀 Quick, easy, and consistent
- 👍 Fantastic application
- 👍 Game-changing app
- 👍 Admissions
- 👍 My go-to app
Room to improve
- 🐛 Hopeless info and double charged
- 🐛 A scam
- 🐛 Big Promise, Big Fizzle
- 🐛 NO! NO! NO!
- 🐛 Formatting
Bugs and requests
Muse Fit
Reported bugs
84 issues- Won't download OTP
- Ring not recording workouts or sleep data
- Ring won't charge
- New update ruined connectivity
- Not recognizing ring
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- Measurements are wrong or don't register
- Ring often disconnects
- Won't allow to stop a workout
- App won't let me change email
- App won't add phone number
- App won't add wallet details
- App doesn't recognize UK
- Charge doesn't last
- Ring overheated when left on charger
- OTP has failed multiple times
- Impossible to access the app
- No login button on the app
- Ring is never synced with the app
- Information isn't available to review
- NFC payment doesn't work in the US
- Ring arrived in 2 pieces
- Case is flashing red and not allowing connection
- Firmware issues
- Inconsistencies in data
- Steps are way over reported
- Sleep data seems to be under reported
- BP measuring takes a while and needs tweaking
- Calibration is necessary too often
- HR values are dramatically off
- HRV numbers are off significantly
- Data is not usable
- Sync is wonky
- Ring does not track steps
- Tracking data is way off
- Finish is wearing off on the edges
- Spo2 and BP are currently not working
- Data synchronization is very slow
- Ring battery health is tucked away
- Ring no longer tracks data when below 20%
- App takes a long time to sync
- App will find the Ring only about 50% of the time
- App crashes immediately after syncing about 90% of the time
- Need to hold phone pretty close to the Ring for it to connect
- Cannot begin a workout until synced
- App constantly crashes
- When app works, doesn't display real-time information
- Deletes the previous days information
- Ring does not work
- No support after 3 emails
- Cannot get a password reset email to work
- Payment function nonexistent
- Tap to start a workout does not work
- Dashboard shows 0 steps, 0 calories
- Won't connect when app is opened unless force stopped
- OTP delivery not working
- Unable to receive OTP
- Getting an error when trying to receive OTP
- Unable to use the app entirely
- App shows limited / no data
- Terrible connection
- Constant syncing issues
- Unreliable data
- Ring doesn't fit
- Cannot get hold of customer support
- Sync shows up on the previous day
- Ring measures something for 2 days then stops
- Get overheated when left on charger
- HR values are dramatically off from chest strap and wrist smart watch wearable
- Sleep tracking numbers are also off significantly
- Data is not usable
- Sync is wonky
- Ring does not actually track or record my steps
- Actual tracking data is WAY off from Apple Watch
- Update did nothing to change the data recording or accuracy
- Finish (black “titanium”) is already beginning to wear off on the edges
- Features like Spo2 and BP are currently not working
- Data synchronisation is very slow
- Ring battery health is tucked away and no longer tracks data when below 20%
- App fails to sync
- Doesn’t even have accurate measurements
- App is just not finished
- A lot of the features don’t show
- Dates on top of the screen are just black
- Ring was supposed to be delivered last November 2023, now October 2024 and not received
Requested features
8 requests- Strava connectivity for running and cycling
- Ability to love sections around to customize layout
- Display ring battery health on the main screen
- Include warnings on battery life well before 20%
- Enable Spo2 and BP features
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- Enable payment feature in the US
- Improve accuracy of step count
- Fix birthdate field problem in the app
Letterly
Reported bugs
3 issues- Login screen freezes
- Incompatible with older devices
- When I get phone calls, I lose the entire recording
Requested features
3 requests- Dark mode option
- Advanced analytics dashboard
- Ability to use the artificial intelligence to search through all of my old notes for similar topics or keywords
In-app purchases
Muse Fit
No in-app purchases
Letterly
- PRO Subscription (1 month)$19.991 Month
- PRO Subscription (3 months)$44.903 Months
- PRO Subscription (1 Year)7 Days trial$69.991 Year
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- PRO Subscription (1 Year)7 Days trial$79.991 Year
- PRO Subscription (1 Year)7 Days trial$89.991 Year
- PRO Subscription (12 months)7 Days trial$99.991 Year
- PRO Subscription (12 months)14 Days trial$99.991 Year
- PRO Subscription (Lifetime)$199.99
- PRO Subscription (Lifetime)$249.99
