Comparison

Windmill Bike vs Rhythma

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

Head to head
About

Windmill Bike

Easily rent and ride a bike to explore Kinderdijk. Reserve and unlock a bike at designated parking spots to begin your adventure in minutes.

Highlights
  • Bike reservation
  • Unlock bikes remotely
  • Multiple parking locations
  • Quick signup process
  • Explore Kinderdijk
Features
Read full description

Download de Windmill Bike app, sign up and start riding in minutes. Simply reserve and unlock a Windmill Bike at any of our parking locations. Please visit windmillbike.nl/how-to-ride/ for more information

About

Rhythma

Features
Read full description

Your cycle doesn’t happen separately from your life. Rhythma brings your cycle and calendar together, helping you plan with your bodyβ€”not against it. Log the first day of your period in one tap, see where you are in your cycle, and get predictions for your next period and optional ovulation window. Connect your iPhone calendar to view upcoming events alongside your cycle. Rhythma helps you notice busy days, create space for recovery, and choose better moments for demanding work, workouts, meetings, and rest. With Rhythma, you can: β€’ Log your period quickly β€’ See your current cycle day and phase β€’ View predicted periods across the year β€’ Optionally estimate ovulation and fertile days β€’ Sync with Apple Calendar β€’ See events and workouts alongside your cycle β€’ Receive phase-aware planning suggestions β€’ Switch between light and dark themes β€’ Use the app in English or Ukrainian Your calendar shows what you have planned. Rhythma adds the context of how you may feel. Cycle and ovulation predictions are estimates for informational and wellness purposes only. Rhythma is not a medical device and should not be used for diagnosis or contraception. Privacy Policy: https://iulianaiagodka.github.io/Rhythma/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Windmill Bike3 screens
Rhythma3 screens

Verdict

The call

The clearest difference is in-app purchases: Windmill Bike at none against Rhythma's 2. Rhythma's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Rhythma sells 2 in-app purchases, starting at $2.99 per month. Windmill Bike asks for nothing beyond the download.

UpkeepUpdate frequency

Windmill Bike ships an update every 3 months, Rhythma every 2 weeks. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard2 real differences Β· 6 level
Windmill Bike versus Rhythma: the parameters behind the verdict, then further details
ParameterWindmill BikeRhythma
PriceFreeFree
Positive reviews0.0% of reviewsβ€”
Update frequencyEvery 3 monthsEvery 2 weeks β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
MonetizationFreeβ€”
DevicesiPhone, iPod β€” betteriPhone
Requires iOS15.6 β€” better16.4
Further details β€” not scored
Size69 MB31 MB
Age rating4+4+
DeveloperX-Bike B.V.Iuliana Iagodka

In-app purchases

None

Windmill Bike

No in-app purchases

2 purchases

Rhythma

Subscriptions2
  • Rhythma Plus Monthly$2.991 Month
  • Rhythma Plus Annual$14.991 Year

Questions

Is Windmill Bike free?
Windmill Bike is free to download, with no in-app purchases.
Is Rhythma free?
Rhythma is free to download, with in-app purchases available.
Do Windmill Bike or Rhythma have ads?
Neither Windmill Bike nor Rhythma shows ads.
Which is updated more often, Windmill Bike or Rhythma?
Windmill Bike ships an update every 3 months, and Rhythma every 2 weeks. Most recently, Windmill Bike was updated on November 3, 2026 and Rhythma on November 6, 2026.

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