MonPosture vs SparkFast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MonPosture
This wearable device uses smart sensors to monitor your body movements and gently vibrates to remind you to correct your posture. It attaches to clothing and offers a monitoring mode to track your posture stats throughout the day.
- Smart sensor technology
- Gentle vibration alerts
- Snap-on clothing attachment
- Monitoring mode
- Posture statistics tracking
- Improves appearance and well-being
Read full descriptionHide full description
MonPosture, your non-intrusive personal trainer for optimal posture habits! Created by MonDevices, Inc, an established health and wellness technology company, MonPosture is a non-intrusive wearable device that safely monitors your body movements using smart sensor technology and a low-energy Bluetooth connection. MonPosture acts like your personal trainer, helping you maintain optimal posture habits by alerting you, through gentle vibration, when you slouch. This reminds you to straighten your body, whether sitting or standing, helping you develop lifelong, optimal posture habits. Unlike other posture correctors, you don't need to affix MonPosture to your skin. Our innovative, patented Snap-On design form factor lets you snap the device onto your clothing quickly and securely. You won't even know it's there unless it needs to alert you that you're slouching! If you prefer not to be alerted at certain times, you can switch your MonPosture to monitoring mode. Our smart sensors will maintain accurate stats on your posture throughout the day so you can study them at your convenience. Good posture gives you a leaner appearance, helping you look and feel better. Maintaining optimal posture also improves comfort and mobility because when your frame is straight when standing or sitting, your muscles work more efficiently. From a health and wellness perspective, good posture strengthens your back and core muscles, helping you eliminate back and neck pain while stimulating better blood flow and overall well-being. Look better, feel better, and be better with MonPosture!
SparkFast
Read full descriptionHide full description
Most fasting apps count hours. SparkFast shows you what those hours might mean — estimated biological milestones that give you a reason to keep going. THE SPARK CHART Your fasting hours aren't just numbers. The SPARK Chart visualizes five estimated biological processes — from early insulin changes to deep cellular recycling — based on published research. It transforms a blank timer into a roadmap of what you're working toward. GUIDED REFEEDING Breaking a prolonged fast matters as much as the fast itself. SparkFast provides step-by-step refeeding protocols tailored to your fast duration and dietary preference. No more Googling "how to break a 72-hour fast" mid-fast. AI-POWERED PERSONALIZATION Tell SparkFast about your goals, experience, dietary preferences, and schedule. Our AI creates a custom fasting plan built around your life — not a one-size-fits-all template. CHALLENGES THAT BUILD HABITS Built-in challenges — from a beginner-friendly 5-day start to a 72-hour deep fast — give you structure and milestones to work toward. Track progress, earn achievements, and build consistency. BIOMARKER TRACKING (OPTIONAL) For users who track glucose, ketones, GKI, or Dr. Boz Ratio: log readings manually or sync from Keto-Mojo and Apple Health. See how your metabolic data trends alongside your fasting practice. Most users start without this — it's there when you're ready. ALSO INCLUDES - Intermittent and prolonged fasting schedules (16:8, 18:6, OMAD, 36h, 48h, 72h+) - Apple Health integration for weight, sleep, steps, and heart rate - Motivational notifications at key fasting milestones - Eating window and hydration tracking - Stool tracking for gut health awareness - Custom trackers for anything you want to monitor BUILT FROM EXPERIENCE SparkFast was born when co-founder Veronica — who went from a BMI of 32 to a normal BMI through fasting — realized she kept printing charts of estimated biological milestones and sticking them on her kitchen wall to stay motivated during 72-hour fasts. That piece of paper became this app. IMPORTANT The SPARK Chart shows estimated timelines based on published fasting research. Actual metabolic responses vary between individuals based on diet history, metabolic health, and other factors. SparkFast is a motivational and educational tool, not a medical device. YOUR PRIVACY SparkFast does not sell personal data. All information is stored securely and encrypted. SUBSCRIPTION SparkFast requires a subscription for full access. Options include monthly and yearly plans, both with a free trial. Payment is charged to your Apple ID at purchase and renews automatically unless cancelled at least 24 hours before the end of the current period. Manage subscriptions in App Store settings. Terms of Service: https://www.sparkfast.app/terms-of-service Privacy Policy: https://www.sparkfast.app/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: MonPosture at none against SparkFast's 6. SparkFast's advantage is update cadence (every 4 days vs every 4 weeks) and device support (4 vs 2). On price, 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. SparkFast sells 6 in-app purchases, starting at $6.99 per month. MonPosture asks for nothing beyond the download.
MonPosture ships an update every 4 weeks, SparkFast every 4 days. The most recent releases landed on June 1, 2026 and September 17, 2026 respectively.
| Parameter | MonPosture | SparkFast |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 4 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 27 MB | 95 MB |
| Age rating | 4+ | 4+ |
| Developer | Mondevices Inc | SparkFast Technologies LLC |
In-app purchases
MonPosture
No in-app purchases
SparkFast
- SparkFast Monthly7 Days trial$6.991 Month
- SparkFast Annual$48.001 Year
- SparkFast Annual$51.001 Year
Show 3 moreShow fewer
- SparkFast Annual$54.001 Year
- SparkFast Annual$57.001 Year
- SparkFast Yearly7 Days trial$64.991 Year









