Comparison

Flow vs NightRing

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

Head to head
About

Flow

Features
Read full description

Flow is your AI-powered fitness companion. Get personalized workout plans tailored to your goals, experience level, and available equipment โ€” all generated instantly. Key Features: - AI-generated workout plans customized to your fitness goals - Scan meals with your camera to instantly log calories and macros - Track your workouts with an intuitive, guided timer - Log progress photos and monitor your physique over time - View your training schedule on a clean, visual calendar - Beautiful, modern interface designed for iOS Whether you're just starting out or looking to level up your training, Flow adapts to you. Set your goals, follow your plan, and track your progress โ€” all in one app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://flow-app-emd.pages.dev/#privacy

About

NightRing

Features
Read full description

"When did I fall asleep last night?" โ€” NightDial answers the moment you open it. It reads the sleep data your Apple Watch or iPhone already saves to Health, and draws each night as an arc on a 24-hour dial. Zero input required. Just sleep like you always do. โ–  Sleep Rings Sleep that crosses midnight stays whole on a circle. Bedtime to wake-up, one arc, one glance. โ–  A calendar of rings One ring per day, a month at a time. Aligned arcs mean a steady rhythm โ€” the messy nights stand out instantly. โ–  Sleep Score Duration, rhythm, continuity, and timing โ€” scored every morning, with the full breakdown visible. You'll know exactly what to fix. โ–  Today's Note One piece of advice a day, picked for your recent sleep pattern from thousands of pre-written insights. โ–  Night Vitals (Apple Watch) Heart rate, respiratory rate, blood oxygen and more, shown alongside each night. โ–  Social Jet Lag See exactly how far your weekends drift from your weekdays โ€” in minutes. Now you know why Mondays hurt. โ–  Privacy Your sleep data is processed entirely on your device and never leaves it. โ€•โ€•โ€•โ€•โ€•โ€•โ€•โ€•โ€•โ€• NightDial Plus (subscription) โ€•โ€•โ€•โ€•โ€•โ€•โ€•โ€•โ€•โ€• The free version fully covers your last 14 days, plus today's score and advice. With Plus you get: - Your entire history, as far back as it goes - Trend charts: bedtime, wake time, score, nightly heart rate - Detailed weekday vs. weekend analysis - No ads Pricing: $0.99/month, $6.99/year (with 7-day free trial), or $16.99 lifetime. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kakovail.info/privacy/ * Requires sleep data in Apple Health (from Apple Watch, or iPhone with a sleep schedule). * NightDial shows rhythm insights only and does not provide medical evaluation or advice.

Screenshots

Flow4 screens
NightRing4 screens

Verdict

The call

The clearest difference is ads: Flow at none against NightRing's shown. Flow also leads on update cadence (every 2 days vs every 3 weeks). NightRing's advantage is iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Flow sells 3 in-app purchases, starting at $2.99 per 7 days and NightRing sells 6 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flow ships an update every 2 days, NightRing every 3 weeks. The most recent releases landed on October 25, 2026 and October 16, 2026 respectively.

Scorecard3 real differences ยท 3 level
Flow versus NightRing: the parameters behind the verdict, then further details
ParameterFlowNightRing
PriceFreeFree
Update frequencyEvery 2 days โ€” betterEvery 3 weeks
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS26.017.0 โ€” better
Further details โ€” not scored
Size93 MB5 MB
Age rating4+4+
DeveloperCARLOS OCTAVIO Gonzalez Momita PerezHiroyuki Kako

In-app purchases

3 purchases

Flow

Subscriptions2
  • Pro Weekly$2.997 Days
  • Pro Yearly3 Days trial$49.991 Year
One-time1
  • Pro Lifetime$149.99
6 purchases

NightRing

Subscriptions2
  • Plus Monthly$0.991 Month
  • Plus Yearly7 Days trial$6.991 Year
One-time4
  • Coffee$2.99
  • Good Burger$9.99
  • Plus Lifetime$14.99
Show 1 more
  • Dinner$29.99

Questions

Is Flow free?
Flow is free to download, with in-app purchases available.
Is NightRing free?
NightRing is free to download, with in-app purchases available.
Do Flow or NightRing have ads?
NightRing shows ads; Flow does not.
Which is updated more often, Flow or NightRing?
Flow ships an update every 2 days, and NightRing every 3 weeks. Most recently, Flow was updated on October 25, 2026 and NightRing on October 16, 2026.

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