Comparison

Ring Sizer · TrueRing vs Water Boy

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

Head to head
About

Ring Sizer · TrueRing

Features
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Find your perfect fit. The essential ring sizer for Oura Ring, Ringconn, and more. Finding the perfect ring size has never been easier. With TrueRing, you can instantly measure your finger or use an existing ring to get a precise size. Say goodbye to bulky tools and embrace the convenience of our advanced digital ring sizer. Whether you're shopping for yourself or a loved one, TrueRing ensures a perfect fit every time. Smart Ring Ready Getting the right fit is crucial, especially for smart rings. Use TrueRing before you purchase your Oura Ring, Ringconn, or Circular Ring to ensure maximum comfort and performance. Our app is also perfect for unique rings like the Q Ring and Darry Ring, making it the most reliable ring sizing tool for modern jewelry enthusiasts. Features that Fit Your Life: • Instant Ring Sizing: Place a ring on the screen to get an accurate size in seconds. • Global Standards: Supports US ring size, EU ring size, and JP ring size. • Precise Measurements: Our cutting-edge algorithm provides high-accuracy results, minimizing guesswork. • Portable & Convenient: A full-featured ring sizer on your phone, ready whenever you need it. Download TrueRing today and experience the simplicity of finding your perfect fit. Privacy Policy: https://www.fagore.com/privacy/ Terms and Conditions: https://www.fagore.com/terms/

About

Water Boy

Features
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Water Boy is your personal hydration assistant that helps you stay on top of your daily water intake. Easily set hydration goals and track every water intake to keep you refreshed throughout the day. With intuitive tracking and clear progress visuals, Water Boy ensures you stay hydrated and maintain a healthy lifestyle. Stay healthy with Water Boy and make drinking water an easy, stress-free habit!

Screenshots

Ring Sizer · TrueRing4 screens
Water Boy4 screens

Verdict

The call

The clearest difference is in-app purchases: Water Boy at none against Ring Sizer · TrueRing's 2. Water Boy also leads on update cadence (every 5 days vs every 3 weeks). On price, ads, device support and iOS requirement 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. Ring Sizer · TrueRing sells 2 in-app purchases, starting at $3.99 per 7 days. Water Boy asks for nothing beyond the download.

UpkeepUpdate frequency

Ring Sizer · TrueRing ships an update every 3 weeks, Water Boy every 5 days. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 4 level
Ring Sizer · TrueRing versus Water Boy: the parameters behind the verdict, then further details
ParameterRing Sizer · TrueRingWater Boy
PriceFreeFree
Update frequencyEvery 3 weeksEvery 5 days — better
AdsYesYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size29 MB44 MB
Age rating17+4+
DeveloperOzgur ULUKANNorvi Net Technology Co., Ltd.

In-app purchases

2 purchases

Ring Sizer · TrueRing

Subscriptions2
  • Weekly Pro3 Days trial$3.997 Days
  • Yearly Pro3 Days trial$44.991 Year
None

Water Boy

No in-app purchases

Questions

Is Ring Sizer · TrueRing free?
Ring Sizer · TrueRing is free to download, with in-app purchases available.
Is Water Boy free?
Water Boy is free to download, with no in-app purchases.
Do Ring Sizer · TrueRing or Water Boy have ads?
Both Ring Sizer · TrueRing and Water Boy show ads.
Which is updated more often, Ring Sizer · TrueRing or Water Boy?
Ring Sizer · TrueRing ships an update every 3 weeks, and Water Boy every 5 days. Most recently, Ring Sizer · TrueRing was updated on October 14, 2026 and Water Boy on October 9, 2026.

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