Fitbit has been in the health tracking game longer than almost anyone. They popularised step counting, made wrist-based heart rate monitoring mainstream, and built one of the largest health data ecosystems in the world. Then Google bought them.
Penng is a newcomer from Cape Town, South Africa, with a different approach: screen-free tracking focused on recovery, strain, sleep, and AI-powered food logging. No step counting obsession. No social media-style badges. Just data that helps you make better decisions about training and nutrition.
This comparison looks at what each does well, where each falls short, and which one actually delivers more for your health in 2026.
Fitbit in 2026: The Google Factor
Before comparing features, it's worth understanding where Fitbit stands today. Google acquired Fitbit in 2021 and has been slowly merging Fitbit into the Google ecosystem. The Fitbit app has been absorbed into Google's health platform, and there's been a noticeable shift in focus.
The current Fitbit lineup is smaller than it used to be. The Fitbit Charge 6 is the standout fitness band, the Fitbit Sense 2 is the health-focused smartwatch, and the Versa 4 is the general-purpose smartwatch. Google has also released the Pixel Watch line, which essentially replaces the high end of Fitbit's range.
Fitbit Premium is a paid subscription that adds extra features to the Fitbit app.
Daily Readiness Score vs Recovery Score
Fitbit's Daily Readiness Score considers your recent sleep, HRV, and activity patterns to generate a score indicating whether you should push hard or recover. It's a solid metric that gives useful guidance.
Google says Daily Readiness is available to everyone who uses Fitbit, with version 4.23 or later of the Fitbit app. Fitbit Premium, a paid subscription, adds extra features.
Penng's Recovery Score runs 0-100% with a traffic-light colour system (green, yellow, red). It's calculated from overnight HRV, resting heart rate, sleep quality, and SpO2. The score is included with your Penng membership. There's no tiered access. Every feature is available to every user.
Beyond the readiness/recovery metric itself, Penng also generates a daily Strain Score (0-100) that tracks your accumulated exertion. Fitbit doesn't have an equivalent strain metric. It tracks Activity Zone Minutes (time spent in fat burn, cardio, and peak heart rate zones), which is useful but measures something different. Activity Zone Minutes tell you how much time you spent exercising. A strain score tells you the total physiological cost of your day.
Verdict: Both give you a daily readiness-style score. Penng pairs its recovery score with a 0-100 strain score and shows it in traffic-light colours.
Sleep Tracking
Fitbit's sleep tracking has been solid for years. It tracks sleep stages (Light, Deep, REM), time asleep, sleep schedule consistency, restlessness, and provides a Sleep Score.
Penng tracks sleep stages (Light, Deep, REM), overnight HRV, resting heart rate, SpO2, and generates a sleep score from 0 to 100. Both devices give you a clear picture of your night.
Fitbit also offers smart wake alarms (vibrating the band during a light sleep phase near your alarm time), which Penng doesn't have.
Penng's advantage is that sleep data feeds directly into your morning recovery score, creating a clear chain: sleep quality affects recovery, recovery guides training intensity, training intensity affects tomorrow's sleep. It's a more integrated framework.
Verdict: Fitbit offers smart wake alarms, which Penng doesn't have. Penng integrates sleep data more tightly into a recovery-strain framework.
Food Tracking
Fitbit has a built-in food logging feature in the app. You can search a database, scan barcodes (on your phone, not the tracker), and manually enter meals. It tracks calories, carbs, fat, protein, sodium, fibre, and water intake. The database is decent.
With Fitbit's food log, you search for a food such as "grilled chicken breast," select a portion size, and add it to your log.
Penng's food tracking uses AI estimates across five input methods:
- Photo - Snap your meal and Gemini Vision AI identifies food and estimates macros.
- Barcode scan - Scan packaged food for standardised nutrition from OpenFoodFacts.
- Text description - Type what you ate and AI parses macros automatically.
- Voice - Speak your meal description and speech-to-text handles the rest.
- Nutrition label photo - Photograph a nutrition label and AI reads the values directly.
The app tracks calories, protein, carbs, fat, fibre, sodium, sugars, and provides a health score and confidence level for each entry.
With Penng, you can photograph a home-cooked meal and the AI estimates it, instead of adding each ingredient. The estimate is not perfect, so you can edit it before you log it.
Verdict: Both apps log food. If you would rather photograph a meal than search a database, Penng's AI input is built for that.
Stress Management
Fitbit offers a stress management feature using an electrodermal activity (EDA) sensor on some models (Sense 2, primarily). It measures your body's stress response through skin conductance and provides a Stress Management Score.
Penng doesn't have a dedicated stress metric or EDA sensor. However, HRV is fundamentally a stress indicator. Elevated stress depresses HRV, which shows up in your recovery score. So while Penng doesn't label it "stress management," the data that drives stress insights is present in the recovery framework.
Verdict: Fitbit has a more explicit stress management feature set, especially with the EDA sensor. Penng captures stress effects through HRV but doesn't package it as a standalone feature.
Hardware and Comfort
The Fitbit Charge 6 has a small OLED screen, weighs about 37g, and has a silicone band. It's slim, comfortable for 24/7 wear, and the screen is bright enough to read outdoors. It supports Google Wallet for payments and has built-in GPS.
Penng has no screen, weighs approximately 40g, and uses a zinc alloy case with a stretchy nylon strap. There's a simple LED indicator: green for Bluetooth connected, red for not connected. No payments. No GPS on the device (phone GPS is used for some workout types).
Both are comfortable for daily and nightly wear. The Fitbit Charge 6 has the advantage of a screen for quick glances at stats, time, and notifications. Penng has the advantage of a completely distraction-free experience.
Verdict: Personal preference. Fitbit is more versatile with its screen. Penng is more minimal and distraction-free.
Battery Life
Google rates the Fitbit Charge 6 at up to 7 days on a charge with default settings. Using the always-on display or SpO2 tracking means charging more often.
Penng lasts approximately 21 days.
Google rates the Fitbit Sense 2 and Versa 4 at 6+ days. The Sense 2 runs up to 5 hours with continuous GPS.
Longer battery life means fewer charging gaps in your data, less time remembering to charge, and more consistent 24/7 tracking.
Verdict: Penng lasts longer between charges: about 21 days, against up to 7 days for the Charge 6.
Water Resistance
Fitbit Charge 6 is rated to 50 metres (5 ATM). You can swim with it, shower with it, and not worry about water at all. Fitbit includes swim tracking as a workout type.
Penng is rated at 1 ATM, which means sweat, rain, and hand washing are fine. Swimming, showering, and water sports are not recommended.
If you swim regularly or want a tracker you never need to worry about around water, Fitbit handles this better.
Verdict: Fitbit wins. 5 ATM versus 1 ATM is a significant difference for anyone who's regularly around water.
Pricing
Prices for brands other than Penng are approximate. Check the seller for the current price before you buy.
Fitbit Charge 6: approximately R3,500 once-off. Fitbit Premium is an optional paid subscription that adds extra features. We could not find Google's current South African price for Fitbit Premium, so check it before you buy.
Without Premium, the three-year cost is the device price: approximately R3,500.
Penng: R499 for the band, which includes 3 months of membership, plus R49 shipping, then R89/month or R890/year. Every feature included. No tiered access.
Year 1 paying monthly: R499 + 9 x R89 + R49 shipping = R1,349 Three-year total paying monthly: R499 + 33 x R89 + R49 shipping = R3,485 (less on the annual plan)
If you add Fitbit Premium, the Charge 6 costs more than Penng over three years. Without Premium, the two cost about the same over three years (about R3,500 against R3,485), and the Charge 6 is cheaper after that. Check our affordable fitness tracker guide for more price comparisons.
Verdict: It depends on whether you add Fitbit Premium and how long you keep the tracker. Penng costs less to start (R499 plus R49 shipping, against about R3,500). With Premium, the Charge 6 costs more over three years. Without Premium, the two are about level at three years (R3,485 paying monthly against about R3,500), and Fitbit's once-off cost works out lower after that.
Head-to-Head Comparison Table
| Feature | Fitbit Charge 6 | Penng |
|---|---|---|
| Screen | Yes (OLED) | No (screen-free) |
| Battery | Up to 7 days (default settings) | 21 days |
| Recovery/Readiness | Daily Readiness Score | Recovery Score (included) |
| Strain tracking | Active Zone Minutes | Strain Score (0-100) |
| Sleep tracking | Yes (stages, score) | Yes (stages, HRV, SpO2) |
| Food tracking | Food logs | AI estimates, 5 methods |
| Stress management | EDA sensor + score | HRV-based (via recovery) |
| Water resistance | 5 ATM (swim-proof) | 1 ATM (splash only) |
| GPS | Yes (built-in) | Phone GPS only |
| SpO2 | Yes | Yes |
| Workout detection | Auto + manual | Manual only |
| Payments | Google Wallet | No |
| Weight | ~37g | ~40g |
| Price | ~R3,500 + optional Premium (paid) | R499 band + R49 shipping, then R89/month or R890/year (all features) |
| SA local support | Not verified | Yes (Cape Town) |
Who Should Buy Fitbit
- People who want a small screen on their wrist for quick stat checks
- Swimmers and water sports participants (5 ATM)
- Anyone who values the explicit stress management features with EDA sensor
- People who prefer a once-off purchase (without Premium)
- Casual fitness trackers who want step counting, basic sleep, and heart rate without a subscription
- Fans of the Google/Fitbit ecosystem
Who Should Buy Penng
- People who want recovery, strain, and food tracking integrated in one platform
- Anyone who finds traditional food logging tedious and wants AI to simplify it
- People who want all features included without a tiered subscription
- Users who value 21-day battery life for consistent data tracking
- South African buyers who want ZAR pricing and local Cape Town support
- Athletes who want a screen-free device that won't distract during training
The Bottom Line
Fitbit is a well-rounded fitness tracker with a screen, GPS and swim tracking. It shows a Daily Readiness Score, Fitbit Premium adds paid features, and its food log works by searching a database.
Penng is narrower in scope and focused on recovery, strain, sleep and food. Its food logging uses AI estimates from a photo, barcode, text, voice or label, and its 21-day battery means fewer charges.
If you want a tracker that does a bit of everything with a screen and GPS, Fitbit is solid. If you want a tracker focused on recovery and nutrition without a screen, Penng is built for that. For a broader comparison, see our best recovery tracker roundup for 2026.
Frequently Asked Questions
Do I need Fitbit Premium to use a Fitbit?
No, Fitbit works without Premium. Google says Daily Readiness is available to everyone who uses Fitbit, with version 4.23 or later of the Fitbit app. Fitbit Premium is a paid subscription that adds extra features. Penng includes all features with its membership (R89/month or R890/year after the 3 months included with the R499 band).
Is Fitbit's food tracking as good as Penng's?
They work differently. Fitbit's food log has you search a database for each food item and choose a portion. Penng uses AI estimates with five input methods, including photographing your meal, and you can edit the estimate before you log it.
Which has better sleep tracking: Fitbit or Penng?
Both offer sleep stage tracking (Light, Deep, REM) and a sleep score. Fitbit also offers smart wake alarms. Penng integrates sleep data more directly into a recovery framework. For most users, both provide sufficiently detailed sleep insights.
Can I swim with a Fitbit Charge 6?
Yes. The Fitbit Charge 6 is rated to 5 ATM (50 metres) and includes swim tracking as a workout type. Penng is rated at 1 ATM and is not recommended for swimming. If you swim regularly, Fitbit handles water significantly better.
Is Penng better value than Fitbit with Premium?
Over three years, Penng costs R3,485 paying monthly (R499 + 33 x R89 + R49 shipping). The Fitbit Charge 6 costs approximately R3,500 once-off, and Fitbit Premium is a paid subscription on top; we could not find Google's current South African Premium price, so check it before you buy. Penng includes all features in its subscription with no tiered access. If you skip Fitbit Premium, the Charge 6 alone costs about the same as Penng over three years, and less after that.
Not sure which health metrics matter most for your goals? Take the free quiz at penng.ai/quiz to find out what your body data is telling you.