Comparison

Sonu vs Replenish

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

Head to head
About

Sonu

This app offers personalized, drug-free acoustic resonance therapy for nasal congestion relief. It uses AI and facial scanning to tailor treatments, delivered via a separate wearable band. Track your progress and enjoy convenient, at-home therapy sessions.

Highlights
  • Personalized acoustic resonance therapy
  • Drug-free treatment
  • AI-enhanced facial scanning
  • Bluetooth connectivity
  • Treatment session tracking
  • Micro vibration options
Read full description

SONU provides personalized, drug free, acoustic resonance therapy to treat nasal congestion symptoms caused by allergic and non-allergic rhinitis. SONU is backed by FDA authorization, extensive clinical trials, and enhanced by AI. SONU works with iPhone X or later models and uses Bluetooth to connect with your iPhone. To get started simply download the app and follow the on-screen instructions to get to your 15 minute treatment session. You can choose to relax with the gentle micro vibrations or go about your daily activities. The SONU app takes a scan of your face using the front facing camera and personalizes the acoustic therapy based on your facial anatomy and other proprietary factors. The acoustic resonance is delivered via medical grade bone conduction transducers in the SONU band (a lightweight, wearable headband purchased separately).  SONU is proven to be safe and effective and also has a history of your treatment sessions in the app so you can track your usage over time.  Medical Disclaimer: This app does not replace or provide medical advice and diagnosis. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Regulatory Jurisdiction: The SONU band is authorized for use by regulatory authorities only in the USA (FDA) and Singapore (HSA). Any feedback? Contact us at https://soundhealth.life/contact/ Additional information including the privacy policy, biometric notice and terms of use can be found at https://soundhealth.life

About

Replenish

This app helps you build a consistent water-drinking habit with a simple, quiet interface. It calculates your personal hydration goal and offers easy logging, with optional, non-intrusive reminders. Designed for focus and privacy, it keeps all your data on your device.

Highlights
  • Personalized daily hydration goal calculation
  • One-tap water logging
  • Friendly drop mascot visualizer
  • 30-day progress tracking
  • Optional customizable reminders
  • Light and dark mode
Features
Read full description

Replenish is a calm, beautifully designed water tracker built for one purpose: helping you actually drink enough water — every day, without the noise of typical health apps. No streaks shaming you. No aggressive notifications. No account. Just water, you, and a habit worth keeping. HOW IT WORKS Open the app. Tap +250ml. Watch your drop fill up. That's it. Behind the simplicity, Replenish does the heavy lifting: it calculates your personal daily hydration goal from your weight, sex assigned at birth, and activity level — so you always know exactly how much water your body needs today. WHAT'S INSIDE - Daily target tailored to you — auto-calculated, or set your own manually - One-tap logging — quick +250ml, custom amount, or undo your last entry - A friendly drop mascot that fills up as you drink, with smooth animations - Today view — total intake, percentage to goal, average per sip, and your timeline - 30-day tracker — see active days, daily average, total intake, and goals met - Streak counter for days you logged water - Optional reminders every 60, 90, or 120 minutes - Light and dark mode automatically PRIVATE BY DESIGN - Everything stays on your device — no cloud, no servers, no exceptions - No account, no sign-up, no email required - No tracking, no analytics, no third-party sharing - Reset all your data anytime with a single tap QUIET, NOT PUSHY Reminders are off by default. If you turn them on during setup or later, you choose the rhythm. We ask for notification permission only after onboarding — and if you say no, reminders stay off without nagging. DESIGNED FOR FOCUS Replenish opens directly on the screen that matters: today's hydration. A discreet menu in the top corner takes you to your tracker or settings whenever you want — never in your way. WHO IT'S FOR Anyone who wants a beautiful, low-effort way to drink more water consistently. Whether you're an athlete, busy professional, parent, student, or someone simply trying to feel better day to day — Replenish meets you where you are and asks nothing more. WHAT IT IS NOT Replenish is a wellness habit-tracking tool. It is not a medical app and does not provide medical advice. It is not intended to diagnose, treat, or replace professional healthcare guidance. Always consult a qualified healthcare provider for medical questions or before making changes to your routine. GET STARTED IN 60 SECONDS Four short steps. Then you're done setting up — and Replenish quietly does its job from there. Replenish. Drink. Repeat. Feel better. Privacy policy : https://replenish-app.com/privacy Terms : https://replenish-app.com/privacy#terms

Screenshots

Sonu4 screens
Replenish3 screens

Verdict

The call

The clearest difference is review sentiment: Replenish at 100% against Sonu's 74%. Replenish also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 8 level
Sonu versus Replenish: the parameters behind the verdict, then further details
ParameterSonuReplenish
PriceFreeFree
Rating4.4 (227 ratings) — better—
Positive reviews74.5% of reviews100.0% of reviews — better
Number of ratings227 — better—
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size191 MB29 MB
Age rating4+4+
DeveloperSound Health Systems, Inc.Souhail Zaki

Customer experience

Sonu

All ratings227 ratings
Positive85.9%
Neutral3.5%
Negative10.6%
Written reviews47 reviews
Positive74.5%
Neutral4.3%
Negative21.3%

Replenish

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Sonu

Reported bugs

6 issues
  • Infinite login loop
  • App locks after session end
  • Bluetooth connection issues
  • Offline mode non-functional
  • Cannot end session
Show 1 more
  • Server maintenance prevents app use

Requested features

11 requests
  • Bring back old features
  • Provide battery life indicator
  • Add warning for high audio
  • Restore alignment check
  • Allow disconnection from band
Show 6 more
  • Provide feedback on band connection status
  • Improve SONUcast loading time
  • Allow users to remove mediation sounds
  • Improve offline mode functionality
  • Add real number scales to data graphs
  • Enable Bluetooth connection to two devices simultaneously

Replenish

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Sonu

No in-app purchases

None

Replenish

No in-app purchases

Questions

Is Sonu free?
Sonu is free to download, with no in-app purchases.
Is Replenish free?
Replenish is free to download, with no in-app purchases.
Do Sonu or Replenish have ads?
Neither Sonu nor Replenish shows ads.

Other comparisons