Comparison

Slendertone Connect vs Eight Sleep

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

Head to head
About

Slendertone Connect

This app offers a personalized training experience to help you achieve your toning goals. It provides custom coaching, interactive programs, workout reminders, and progress tracking, all controlled wirelessly via your smart device. Achieve firmer abs, improved posture, and enhanced core strength.

Highlights
  • Personalized training experience
  • Custom toning programs
  • Interactive toning programs
  • Workout reminders
  • Progress tracking
  • Wireless control via smart device
Features
Read full description

A completely personalised training experience to keep you motivated and help you hit your toning targets from 4 weeks Requirements • Slendertone Connect abs toning belt • iPhone 5S (or newer) What are the benefits of a stronger core? A strong core offers much more than toned abs and a flatter tummy – it helps you run further, jump higher, sit straighter, stand taller and feel amazing. Connect is the smartest, most innovative abdominal trainer available, offering custom coaching and motivation, interactive toning programmes, workout reminders and progress tracking. Custom toning programmes 5 high-intensity programmes for specific training goals, including: 1. Essential abdominal training – improve abdominal definition and look and feel amazing. 2. Advanced abdominal training – take your core strength and endurance to the next level. 3. Post-natal firming – for busy mums toning the tummy and getting back into shape. 4. Complement your fitness regime – boost your performance in sports and training. 5. Upcoming event – reduce your waistline and tone your abs for special occasions. Personal coaching Personalised coaching and motivation, progress tracker and toning reminders to help you hit every training goal and beat your weekly workout targets. Sync seamlessly You can sync your smart device to your Connect belt to wirelessly control every toning workout. Complete abdominal workout Strengthens all of the abdominal muscles: the transversus and rectus abdominis (the six pack) and the internal and external obliques. The deep, difficult-to-tone transversus abdominis helps reduce the waistline by tightening and firming the tummy. Clinically proven technology Clinical trials conducted by Dr John Porcari at the University of Wisconsin-La Crosse (2005 and 2009) concluded: • 100% of users reported firmer, more toned abs from 6 weeks. • Users experienced a 72% average increase in abdominal endurance from 4 weeks. • Users experienced a 49% average increase in abdominal strength from 4 weeks. • Users reduced their waistline by an average of 3.5cm from 8 weeks. • 54% of users reported improved posture from 4 weeks. With extensive clinical trials and 50+ years of expertise, we are constantly perfecting and testing our products so that you can achieve the very best results. To find out more about our unique brand, innovative technology and clinical trials, please visit us at slendertone.com.

About

Eight Sleep

This advanced sleep system intelligently adjusts temperature and elevation for personalized comfort. It tracks detailed sleep metrics and provides insights to help you wake up refreshed. The system supports up to two users with individual profiles and learns over time.

Highlights
  • Personalized temperature control
  • Automatic sleep stage tracking
  • Heart rate and HRV monitoring
  • Smart alarm with vibration
  • Dual user sleep profiles
  • AI-driven sleep insights
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Introducing Pod 6. The setup is as effortless as your sleep. Guided Hub setup gets you paired in minutes, a live priming screen decodes your Pod's lights in real time so you're never guessing, and Solo Pod owners get a path built just for them. Your best sleep starts tonight. The Eight Sleep Pod is the intelligent sleep system that gives you up to one hour more of sleep every night. It cools. It heats. It elevates. PERSONALIZED SLEEP WITH AUTOPILOT Autopilot is the intelligence behind the Pod. It adjusts your temperature and elevation to perfect your sleep experience. LEARN ABOUT YOUR SLEEP AND HEALTH View your sleep stages, time slept, heart rate, HRV, and snoring. Plus, receive personalized insights and recommendations. WAKE UP REFRESHED With customizable chest-level vibration and a gradual thermal change, you will wake up gently and feel fully refreshed. TWO SLEEP PROFILES PER POD Autopilot creates a profile for up to two individuals on the same Pod and refines overtime. Have questions? We’re here to help. Email us at support@eightsleep.com. Terms of Use: - www.eightsleep.com/app-terms-conditions/ - www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Slendertone Connect3 screens
Eight Sleep4 screens

Verdict

The call

The clearest difference is in-app purchases: Slendertone Connect at none against Eight Sleep's 2. Slendertone Connect also leads on iOS requirement (14.0 vs 18.0). Eight Sleep's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 months). On price, monetization model and device support 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. Eight Sleep sells 2 in-app purchases, starting at $18.99 per month. Slendertone Connect asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Eight Sleep holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Eight Sleep has 18K ratings behind it against 456, so its average is the more settled of the two. Written reviews point the same way: 17% of Slendertone Connect's written reviews are positive against 29% of Eight Sleep's.

UpkeepUpdate frequency

Slendertone Connect ships an update every 2 months, Eight Sleep every 4 days. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

Scorecard7 real differences · 3 level
Slendertone Connect versus Eight Sleep: the parameters behind the verdict, then further details
ParameterSlendertone ConnectEight Sleep
PriceFreeFree
Rating4.6 (456 ratings)4.8 (18K ratings) — better
Positive reviews17.0% of reviews28.7% of reviews — better
Number of ratings45618K — better
Update frequencyEvery 2 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better18.0
Further details — not scored
Size42 MB259 MB
Age rating17+12+
DeveloperSlendertoneEight Sleep, Inc

Customer experience

Slendertone Connect

All ratings451 ratings
Positive88.9%
Neutral1.8%
Negative9.3%
Written reviews100 reviews
Positive17.0%
Neutral5.0%
Negative78.0%

Eight Sleep

All ratings17,805 ratings
Positive94.4%
Neutral1.3%
Negative4.2%
Written reviews832 reviews
Positive28.7%
Neutral11.1%
Negative60.2%

User reviews

Slendertone Connect

From 456 App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Consistent performance
  • 💪 Effective for toning

Room to improve

  • 🐛 Frequent disconnections
  • ⚠️ Unreliable app
  • 🔁 Constant need to re-pair
  • 💻 Buggy and crash-prone
  • 🔒 Privacy concerns

Eight Sleep

From 18K App Store ratings

What we love

  • 🚀 Amazing sleep quality
  • 🌡️ Effective temperature control
  • 📊 Detailed sleep tracking
  • 🤖 Helpful AI features
  • 🏆 Great customer service

Room to improve

  • 🐛 Buggy app with frequent crashes
  • 🔌 Requires constant internet connection
  • 🕰️ Alarm and temperature controls not intuitive
  • 🔄 Inconsistent sleep data and metrics
  • 💰 Expensive with mandatory subscription

Bugs and requests

Slendertone Connect

Reported bugs

4 issues
  • Login issues
  • Connectivity problems
  • Crashes during setup
  • Data loss and progress not tracked

Requested features

3 requests
  • Integration with Apple Health
  • Apple Watch app
  • Stay-logged-in option

Eight Sleep

Reported bugs

5 issues
  • App freezes and loses connection to pod
  • Alarms not working or turning off properly
  • Temperature settings not saving or resetting
  • Sleep data not syncing or displaying accurately
  • Frequent app crashes and performance issues

Requested features

5 requests
  • Apple Watch app integration
  • Offline temperature/alarm controls
  • Customizable sleep tracking and insights
  • Improved alarm snooze/dismiss functionality
  • Nap mode and more sleep schedule flexibility

In-app purchases

None

Slendertone Connect

No in-app purchases

2 purchases

Eight Sleep

Subscriptions2
  • 8+ Pro (Monthly)$18.991 Month
  • 8+ Pro (Annual)$179.991 Year

Questions

Is Slendertone Connect free?
Slendertone Connect is free to download, with no in-app purchases.
Is Eight Sleep free?
Eight Sleep is free to download, with in-app purchases available.
Which has better reviews, Slendertone Connect or Eight Sleep?
Eight Sleep is rated higher. Slendertone Connect averages 4.6 out of 5 from 456 ratings, while Eight Sleep averages 4.8 from 18K ratings.
Do Slendertone Connect or Eight Sleep have ads?
Slendertone Connect shows ads; Eight Sleep does not.
Which is updated more often, Slendertone Connect or Eight Sleep?
Slendertone Connect ships an update every 2 months, and Eight Sleep every 4 days. Most recently, Slendertone Connect was updated on November 1, 2026 and Eight Sleep on November 8, 2026.

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