Shopping for a budget Bluetooth-calling smartwatch usually ends at the same fork in the road: the boAt Wave Sigma vs Noise ColorFit Pro 4. Both promise big displays, calling from the wrist, health tracking and week-long battery life at prices that undercut premium watches many times over. So which one deserves your wrist?
The honest answer is that both are competent — but they prioritise different things. One leans into display size and loud, clear calling; the other bets on a refined app experience and everyday polish. Here are the five key differences that will actually decide which watch you enjoy wearing.
| Aspect | boAt Wave Sigma | Noise ColorFit Pro 4 |
|---|---|---|
| Price band | Budget, aggressive sale pricing | Budget, similar street price |
| Display | Large, bright colour display | Large, bright colour display |
| Bluetooth calling | Built-in speaker and mic | Built-in speaker and mic |
| Health tracking | Heart rate, SpO2, sleep | Heart rate, SpO2, sleep |
| Battery claim | Roughly a week of typical use | Roughly a week of typical use |
| Companion app | boAt wearable app | NoiseFit app |
| Water resistance | Splash and sweat resistant | Splash and sweat resistant |
Quick Verdict
Want the biggest screen and the loudest calling experience for the money? The boAt Wave Sigma is your pick. Its large display makes notifications easy to read at a glance, and the speaker gets loud enough to take calls comfortably in moderately noisy rooms.
Prefer a more polished day-to-day experience with a better companion app and cleaner software? The Noise ColorFit Pro 4 takes it. Noise’s app ecosystem feels more mature, syncing is generally smoother, and the overall package feels a touch more refined on the wrist.
Price and Display Compared
Both watches live in the same budget lane, and their street prices overlap heavily during sales. You will frequently find them within a few hundred rupees of each other, so the boAt Wave Sigma vs Noise ColorFit Pro 4 decision rarely comes down to price alone.
On displays, both go big and bright. The Wave Sigma’s large colour screen is tuned for glanceability — big text, bold watch faces, and enough brightness to stay readable outdoors. The ColorFit Pro 4 matches it with a similarly large, vivid panel and slim bezels that make the screen feel even bigger than it is.
Neither display will trouble a premium AMOLED panel for contrast, but both are more than good enough for notifications, workout stats and watch faces. If display size is your top criterion, compare them side by side in a store — personal preference matters more than spec sheets here.
Design, Build and Strap Comfort
Both watches use the now-standard square-ish case design with silicone straps, and both are light enough to forget on your wrist. The differences are subtle but real.
The Wave Sigma has a slightly sportier look, with a chunkier case that suits larger wrists. The strap is soft and the buckle feels secure, though the case can look oversized on slim wrists.
The ColorFit Pro 4 feels a touch sleeker, with cleaner lines and a case profile that sits flatter. Strap comfort is excellent on both, and both use standard quick-release-style straps, so swapping colours is easy and cheap. For general buying advice, our smartwatch buying guide covers case sizes, strap types and what to check before buying.
Bluetooth Calling: Which Is Clearer?
Bluetooth calling is the headline feature on both watches, and both let you answer calls from your wrist via a built-in speaker and microphone. In quiet rooms, both work well — the caller hears you clearly and you hear them fine.
Push them harder and differences emerge. The Wave Sigma’s speaker plays louder, which helps in moderately noisy environments like a busy street or a running fan. The ColorFit Pro 4’s speaker is slightly quieter at max volume but voices sound a touch more natural, with less of the tinny edge that small watch speakers tend to have.
On the mic side, both pick up your voice adequately indoors. In wind or traffic, expect the caller to hear some background on either watch — wrist-worn mics have physical limits no software fully fixes. If you want a bigger screen with calling chops, also see our picks for the best smartwatches under 2000 with AMOLED displays.
Health Tracking Accuracy
Both watches cover the standard trio: continuous heart-rate monitoring, blood-oxygen (SpO2) readings and sleep tracking, plus step counting and multiple sport modes. Set expectations correctly and both are useful.
For resting heart rate and workout trends, both are consistent enough to track fitness progress over weeks — which is what actually matters. Neither replaces a medical device, and SpO2 readings on both should be treated as wellness estimates, not diagnostics.
Sleep tracking is where budget watches often stumble, and both are merely decent here: total sleep time is usually close, but sleep-stage breakdowns should be taken with a pinch of salt. Between the two, accuracy is close enough that it should not decide your purchase — pick based on display, calling and app experience instead.
Battery Life in Real Use
Both brands claim roughly a week of typical use, and real-world results land in the same ballpark — usually several days to about a week depending on how you use them. That is the beauty of budget smartwatches: no daily charging anxiety.
What drains the battery fastest is the same on both: Bluetooth calling, high brightness, and the always-on display if enabled. Use calling heavily and keep brightness maxed, and you will be charging every few days instead. Keep calling occasional and brightness on auto, and a full week is realistic.
Charging is magnetic on both and takes roughly a couple of hours from empty. Neither supports fast charging in any meaningful sense, but with multi-day battery life, that hardly matters. Call this round a tie.
App Experience and Watch Faces
This is where the Noise ColorFit Pro 4 pulls ahead. The NoiseFit app is one of the more polished companion apps in the budget segment — pairing is straightforward, syncing is reliable, and the watch-face store is deep, with genuinely attractive free options.
The boAt wearable app covers the basics: syncing health data, changing watch faces and tweaking settings. It works, but the interface feels less refined and the watch-face selection, while large, is hit-or-miss on quality.
If your watch ever refuses to sync, do not panic — our smartwatch not syncing fix guide resolves the most common pairing and sync issues step by step.
Final Verdict
The boAt Wave Sigma vs Noise ColorFit Pro 4 contest has no runaway winner — just two good watches with different strengths. Choose the Wave Sigma if you want the biggest display and loudest calling experience for your money, especially on larger wrists.
Choose the ColorFit Pro 4 if you value a smoother app experience, more reliable syncing and a sleeker design. Either way, you get Bluetooth calling, solid health tracking and multi-day battery at a fraction of premium prices — which is exactly why this segment keeps winning.
Which has a better display, boAt Wave Sigma or Noise ColorFit Pro 4?
Both have large, bright colour displays that are easy to read indoors and outdoors. The Wave Sigma goes slightly bigger, while the ColorFit Pro 4’s slimmer bezels make its screen feel expansive. Neither is a bad pick for display quality.
Can both watches make Bluetooth calls?
Yes. Both include a built-in speaker and microphone for answering calls from your wrist. The Wave Sigma’s speaker plays louder, while the ColorFit Pro 4’s call audio sounds slightly more natural.
How accurate is health tracking on these watches?
Good enough for fitness trends, not for medical use. Heart-rate tracking during rest and workouts is consistent on both, while SpO2 and sleep-stage data should be treated as wellness estimates rather than precise measurements.
How long does the battery last on each?
Both claim roughly a week of typical use, and real-world results are similar — several days to about a week. Heavy Bluetooth calling and high brightness drain the battery faster on both watches.
Which has the better companion app?
The Noise ColorFit Pro 4, via the NoiseFit app. It offers smoother syncing, a cleaner interface and a deeper watch-face store than the boAt wearable app, which covers the basics but feels less polished.