Comparison

Sleep Cycle Calculator 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

Sleep Cycle Calculator

This app helps you improve sleep habits by calculating optimal sleep and wake times based on sleep cycles and desired duration. It also offers sleep sounds to aid in falling asleep faster and achieving deeper rest.

Highlights
  • Sleep cycle calculation
  • Optimal sleep duration calculation
  • Variety of sleep sounds
  • User-friendly interface
  • Subscription for unlimited access
Features
Read full description

Sleep Timer: Calculator, Sounds helps you calculate bedtime and wake-up options based on your sleep schedule. Main Features: • Calculate bedtimes and wake-up times by sleep cycle. • Calculate sleep schedules by preferred duration. • Customize fall-asleep time and cycle length. • Play sleep sounds with an optional timer. Disclaimer: Sleep Timer: Calculator, Sounds provides sleep schedule calculations for informational purposes only. It is not a medical device and does not provide medical advice, diagnosis, or treatment. SUBSCRIPTION INFORMATION An optional subscription gives you unlimited access to all app features during the active subscription period. A one-time purchase option may also be available for lifetime access. • Payment will be charged to your Apple Account at confirmation of purchase. • The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. • Your account will be charged for renewal within 24 hours before the end of the current period. • You can manage or cancel your subscription in your App Store account settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. Privacy Policy: https://13520178.github.io/sleepcalculator/policy.html Terms of Use: https://13520178.github.io/sleepcalculator/terms.html Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ For questions or support, contact us at: phannhatd@gmail.com

About

Ring Sizer

Accurately measure rings, jewelry, and other objects using advanced AR technology and a digital ruler. Supports multiple international sizing systems for precise fitting.

Highlights
  • Measure rings and jewelry with AR
  • Digital ruler for object measurement
  • Supports US, AU/GB, EU/ISO, JP/CN sizing
  • AR tape measure functionality
  • Precise diamond/gemstone ring sizing
Features
Read full description

Introducing Ring Fing, your perfect digital solution for sizing rings, jewelry, and much more with incredible accuracy! This user-friendly app has advanced AR functionality and a versatile ruler, making it a must-have tool for anyone looking to measure various objects easily. Discover the amazing features of our Ring Fing app: *** - Effortlessly measure rings, jewelry, and other objects with unique visual cues for precise measurements; *** - Choose from the most popular measurement systems, including the US, AU/GB, EU/ISO, and JP/CN; *** - Utilize the versatile digital ruler to measure any object accurately; *** - Experience the cutting-edge AR tape measure feature to measure anything using your phone camera; *** - Ensure the perfect fit for your diamond or gemstone ring with our easy-to-use ring sizer tool. Whether you're shopping for a stunning crystal necklace or trying to find the right size for your hitched ring, the Ring Fing app has got you covered. Don't miss out on this essential measuring tool! Try the Ring Fing app today and enjoy the ultimate convenience of having all your measurement needs in one place. Unlock exclusive features with the Premium version: Measure Using Augmented Realiity. Enjoy Limitless Feature Access. Remove Ads. Subscription Details: Payment will be charged to iTunes Account at confirmation of purchase. Subscription with a free trial period will automatically renew to a paid subscription. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period at the rate of the selected plan. Subscriptions and auto-renewal may be managed by going to Account Settings after purchase. You can cancel your subscription or free trial in the iTunes settings at least 24-hours before the end of the free trial period. The cancellation will take effect the day after the last day of the current subscription period and you will be downgraded to the free service. Subscription Options: Weekly: $3.99 3 Months: $9.99 For other currencies, the price corresponds to the same tier on the App Store Pricing Matrix. Privacy policy: https://sites.google.com/view/scelcunovairina/Privacy-Policy Terms of use: https://sites.google.com/view/scelcunovairina/terms

Screenshots

Sleep Cycle Calculator3 screens
Ring Sizer3 screens

Verdict

The call

The clearest difference is rating: Sleep Cycle Calculator at 4.7 against Ring Sizer's 2.7. Sleep Cycle Calculator also leads on ads (none vs shown) and review sentiment (71% vs 50%). On price, ratings volume, update cadence and in-app purchases 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. Sleep Cycle Calculator sells 3 in-app purchases, starting at $1.99 per month and Ring Sizer sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sleep Cycle Calculator holds the better App Store score, 4.7 against 2.7. Both are backed by a comparable volume of ratings — 15 and 14 respectively. Written reviews point the same way: 71% of Sleep Cycle Calculator's written reviews are positive against 50% of Ring Sizer's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Sleep Cycle Calculator versus Ring Sizer: the parameters behind the verdict, then further details
ParameterSleep Cycle CalculatorRing Sizer
PriceFreeFree
Rating4.7 (15 ratings) — better2.7 (14 ratings)
Positive reviews71.4% of reviews — better50.0% of reviews
Number of ratings15 — better14
Update frequencyEvery 2 monthsEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size4 MB17 MB
Age rating4+4+
DeveloperPhan Nhat ĐangIrina Scelcunova

Customer experience

Sleep Cycle Calculator

All ratings15 ratings
Positive93.3%
Neutral0.0%
Negative6.7%
Written reviews7 reviews
Positive71.4%
Neutral0.0%
Negative28.6%

Ring Sizer

All ratings14 ratings
Positive42.9%
Neutral0.0%
Negative57.1%
Written reviews12 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

3 purchases

Sleep Cycle Calculator

Subscriptions2
  • 1-Month Subscription$1.991 Month
  • 1-Year Subscription$9.991 Year
One-time1
  • Unlock all features$17.99
2 purchases

Ring Sizer

Subscriptions2
  • Ring Sizer7 Days trial$3.997 Days
  • Ring Fing Vip for three months$9.993 Months

Questions

Is Sleep Cycle Calculator free?
Sleep Cycle Calculator is free to download, with in-app purchases available.
Is Ring Sizer free?
Ring Sizer is free to download, with in-app purchases available.
Which has better reviews, Sleep Cycle Calculator or Ring Sizer?
Sleep Cycle Calculator is rated higher. Sleep Cycle Calculator averages 4.7 out of 5 from 15 ratings, while Ring Sizer averages 2.7 from 14 ratings.
Do Sleep Cycle Calculator or Ring Sizer have ads?
Ring Sizer shows ads; Sleep Cycle Calculator does not.
Which is updated more often, Sleep Cycle Calculator or Ring Sizer?
Sleep Cycle Calculator ships an update every 2 months, and Ring Sizer every 2 months. Most recently, Sleep Cycle Calculator was updated on November 7, 2026 and Ring Sizer on November 3, 2026.

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