Comparison

Koko Messages vs Ring Sizer

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

Head to head
About

Koko Messages

Leave messages tied to specific real-world locations. Recipients will only see your message when they are physically present at that spot. It's a unique way to share reminders, surprises, or memories with yourself or others.

Highlights
  • Leave messages at real-world locations
  • Messages appear when recipients are nearby
  • Set proximity for message visibility
  • Leave reminders for yourself or friends
  • Surprise friends with location-based messages
  • Capture memories tied to specific places
  • Revisit your past messages from your profile
Features
Read full description

Koko lets you drop messages at real places. For yourself. For friends. Or for anyone nearby. They appear when the right person arrives. Koko is a place-based messaging app built around real presence. Drop a message at the place you’re actually at. Choose how close someone needs to be to see it. When they enter that range, your message appears. Use Koko to: • Leave reminders for your future self or friends • Surprise friends when they arrive • Share something helpful at a place you love • Capture memories tied to where they happened Kokos are meant to be created from where you stand. That keeps messages connected to real places and real moments. And even when you’re far away, you can revisit your own kokos from your profile, a personal record of the places you’ve been. Download Koko now and start leaving messages where they matter.

About

Ring Sizer

Instantly determine your precise ring size for online shopping, custom orders, or gift purchases. Offers multiple international sizing standards and saves your measurements for future use. Get accurate results with clear, step-by-step instructions.

Highlights
  • Instant ring size measurement
  • Support for multiple international sizing standards
  • Save and access size history
  • Step-by-step measurement guidance
  • Measure for custom ring widths
Read full description

Ring Sizer: Find Your Perfect Ring Size Find your perfect ring size instantly with Ring Sizer. Whether you're shopping for an engagement ring, ordering a wedding band online, or checking your size for custom jewelry, get accurate measurements in seconds. Perfect for: - Engagement ring shopping online - Wedding band sizing at home - Jewelry gift purchases - Custom ring orders - Online shopping preparation Key Features: - Instant Measurement: Get your ring size in seconds with easy-to-use tools - Multiple Standards: Supports US, UK, EU, and international sizing systems - Size History: Save and access your measurements for future reference - Step-by-Step Guidance: Clear instructions ensure accurate results - Custom Width Support: Measure for different ring styles and widths Never guess your ring size again. Download Ring Sizer and shop with confidence. Some features may require an in-app purchase. Need help? Contact us at support@reku.dev Privacy Policy: https://myringsizer.app/privacy.html Terms & Conditions: https://myringsizer.app/terms.html

Screenshots

Koko Messages4 screens
Ring Sizer4 screens

Verdict

The call

The clearest difference is in-app purchases: Koko Messages at none against Ring Sizer's 3. Koko Messages also leads on review sentiment (100% vs 71%). Ring Sizer's advantage is update cadence (every 3 weeks vs every 2 months) and ratings volume (35 vs 11). On price, rating, ads and device support 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 sells 3 in-app purchases, starting at $3.99 per 7 days. Koko Messages asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Koko Messages against 4.8 for Ring Sizer. Both are backed by a comparable volume of ratings — 11 and 35 respectively. Written reviews are what separate them: 100% of Koko Messages's written reviews are positive against 71% of Ring Sizer's.

UpkeepUpdate frequency

Koko Messages ships an update every 2 months, Ring Sizer every 3 weeks. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 5 level
Koko Messages versus Ring Sizer: the parameters behind the verdict, then further details
ParameterKoko MessagesRing Sizer
PriceFreeFree
Rating4.9 (11 ratings) — better4.8 (35 ratings)
Positive reviews100.0% of reviews — better71.4% of reviews
Number of ratings1135 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size4 MB29 MB
Age rating12+4+
DeveloperKokoSphere LLCRamkumar Vellaisamy

Customer experience

Koko Messages

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Ring Sizer

All ratings35 ratings
Positive94.3%
Neutral2.9%
Negative2.9%
Written reviews7 reviews
Positive71.4%
Neutral0.0%
Negative28.6%

In-app purchases

None

Koko Messages

No in-app purchases

3 purchases

Ring Sizer

Subscriptions2
  • Ring Sizer Weekly$3.997 Days
  • Ring Sizer Yearly$9.991 Year
One-time1
  • Ring Sizer Lifetime$19.99

Questions

Is Koko Messages free?
Koko Messages is free to download, with no in-app purchases.
Is Ring Sizer free?
Ring Sizer is free to download, with in-app purchases available.
Which has better reviews, Koko Messages or Ring Sizer?
Koko Messages is rated higher. Koko Messages averages 4.9 out of 5 from 11 ratings, while Ring Sizer averages 4.8 from 35 ratings.
Do Koko Messages or Ring Sizer have ads?
Neither Koko Messages nor Ring Sizer shows ads.
Which is updated more often, Koko Messages or Ring Sizer?
Koko Messages ships an update every 2 months, and Ring Sizer every 3 weeks. Most recently, Koko Messages was updated on October 16, 2026 and Ring Sizer on October 8, 2026.

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