Best Smart Scales for Mounjaro Users UK 2025 (If You Must Weigh)
We don't recommend daily weighing on Mounjaro—measurements and photos work better. But if you ARE going to weigh yourself, at least get a smart scale that tracks long-term trends, smooths out daily fluctuations, and provides context beyond just weight. We tested 5 top UK smart scales for accuracy, app quality, and value. Here's what actually works.
🏆 Quick Rankings (TL;DR)
- ✓ #1: Withings Body+ (Best app, trend tracking, WiFi)
- ✓ #2: Renpho Smart Scale (Best value, good app)
- ✓ #3: Eufy Smart Scale P2 Pro (Premium features, higher price)
- ✓ Budget: Salter MaxView (Basic digital, no app, £15)
- ✓ Skip: Cheap Amazon basics (inaccurate, frustrating)
⚠️ Important Reminder
Smart scales are optional. Measurements with a £3 tape measure are MORE useful for tracking Mounjaro progress than any scale. Only buy a smart scale if you genuinely want the data—not because you feel you "should."
Best practice: Even with a smart scale, limit weighing to once per week MAXIMUM (monthly is better).
What Makes a Good Smart Scale for Mounjaro?
Essential features:
- Trend graphs: Shows weight trajectory over weeks/months (smooths daily fluctuations)
- Auto-sync: Bluetooth/WiFi to app (no manual logging)
- Accuracy: ±200g or better
- Multiple users: Recognizes different household members
Nice-to-have features:
- Body composition metrics (fat %, muscle mass—take with grain of salt, not super accurate)
- Weather compensation (adjusts for atmospheric pressure)
- WiFi sync (better than Bluetooth, auto-uploads without phone nearby)
Features that DON'T matter:
- Heart rate measurement (gimmick, inaccurate via feet)
- BMI calculation (you can calculate this yourself, it's just weight/height)
- Pregnancy mode (irrelevant for Mounjaro users)
Top 5 Smart Scales Tested
Withings Body+ WiFi Smart Scale
Price: £69-89 | Connectivity: WiFi + Bluetooth | Max weight: 180kg
✓ Pros
- Best app (Health Mate)—excellent trend graphs
- WiFi auto-sync (no phone needed)
- Very accurate (±100g)
- Long battery life (18 months)
- Recognizes 8 users automatically
- Body composition metrics included
- Integrates with Apple Health, Google Fit
✗ Cons
- Most expensive tested
- Setup can be fiddly (WiFi connection)
- Overkill if you only weigh monthly
Why it wins: The Health Mate app is genuinely brilliant for Mounjaro users. It shows a smooth trend line through your fluctuating daily weights, making it easy to see ACTUAL progress despite water/digestive noise. Worth the premium price if you're data-driven.
Renpho Smart Scale
Price: £25-35 | Connectivity: Bluetooth | Max weight: 180kg
✓ Pros
- Excellent value (1/3 price of Withings)
- Good app with trend graphs
- 13 body metrics tracked
- Accurate enough (±200g)
- Easy setup
- Unlimited users
✗ Cons
- Bluetooth only (need phone nearby)
- App quality not quite as polished as Withings
- Battery life shorter (6-9 months)
Best for: Budget-conscious users who want smart features without premium price. Honestly, for most people, this is plenty.
Eufy Smart Scale P2 Pro
Price: £49-65 | Connectivity: WiFi + Bluetooth | Max weight: 150kg
✓ Pros
- 3D body model visualization (cool but not essential)
- WiFi + Bluetooth
- 16 metrics tracked
- Good app (EufyLife)
- Rechargeable battery (USB-C)
✗ Cons
- Lower max weight (150kg vs 180kg)
- More expensive than Renpho
- Extra features don't add much value
Best for: People who want mid-tier pricing with WiFi but don't want to pay Withings prices.
Salter MaxView Digital Scale (Non-Smart)
Price: £12-18 | Connectivity: None (basic digital) | Max weight: 180kg
Why it's here: If you're ONLY weighing once per month and manually recording it, this basic digital scale is perfectly adequate. Save £50+ and buy a measuring tape instead.
Pros: Cheap, simple, accurate, large display
Cons: No app, manual recording, no trend tracking
Best for: Minimalists who don't want apps/data.
Cheap Amazon Basics Scales (Various)
Price: £15-20 | Problem: Wildly inaccurate
Why to avoid: We tested 3 different budget "smart" scales from Amazon. All showed weight variations of ±500g-1kg within same minute. Completely unreliable.
If budget is tight: Buy the Salter basic digital (£15) instead. At least it's accurate.
Our Recommendation
For most Mounjaro users: Renpho Smart Scale (£28) offers best value. Good app, accurate, affordable.
If money's no object: Withings Body+ (£79) has superior app with best trend visualization for Mounjaro's fluctuating weights.
If on tight budget: Salter MaxView basic digital (£15) + £3 measuring tape = £18 total. Better allocation of funds than a poor-quality smart scale.
If you'd obsess over daily data: DON'T buy a smart scale. The temptation to weigh daily is too strong. Stick to monthly manual weigh-ins.
🛒 Shop Smart Scales & Tracking Tools
All tested smart scales, basic scales, measuring tapes, and progress tracking accessories.
Tracking Tools
5 Products
Clever Fox Weight Loss Journal
Progress tracking
Dedicated weight loss journal for tracking meals, exercise, and medication effects
View on Amazon
Withings Body+ Smart Scale
WiFi connected
Smart WiFi scale with body composition analysis - track weight loss progress digitally
View on Amazon
Bluetooth Smart Scale
13 measurements
Bluetooth bathroom scale with 13 body composition measurements for detailed tracking
View on Amazon
Eufy Smart Scale P1
14 measurements
Smart scale with 14 health measurements and app sync for comprehensive tracking
View on Amazon
RENPHO Body Fat Scale
Body composition
Bluetooth body fat scale with app for tracking weight loss and body changes
View on AmazonAffiliate disclosure: As an Amazon Associate, we earn from qualifying purchases. All product recommendations based on genuine testing. Prices accurate as of November 2025.
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Compare Prices Now →Final Thoughts
Smart scales are OPTIONAL for Mounjaro success. Measurements and photos tell a better story.
But if you want one: Renpho (£28) for value, Withings Body+ (£79) for best-in-class experience.
Most important rule: Use it wisely. Monthly weigh-ins MAX. Let the app show you trends, not daily noise.
✅ Smart Scale Best Practices
- ✅ Weigh same day/time weekly or monthly (NOT daily)
- ✅ Focus on trend line in app, not individual weigh-ins
- ✅ Combine with measurements and photos
- ✅ Expect 1-3kg daily fluctuations (water/digestive)
- ✅ Judge progress over 4-week periods minimum
- ❌ Don't obsess over daily 0.2kg changes