Comparison

RosaKnock vs ShowerChallenge

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

Head to head
About

RosaKnock

Features
Read full description

Time blindness is real: you start something and, before you know it, far more time has passed than you thought. A shower, getting ready, a study block, focused work โ€” the minutes quietly slip away. RosaKnock is the gentle tap that keeps you aware of time. Rosa "knocks" on your Apple Watch or iPhone at the interval you choose, so the time comes to you: no glancing, no alarms, no breaking your flow. Run a session wherever you are. Start it on your Apple Watch for a tap on the wrist, or run it right on your iPhone โ€” no Watch needed. iPhone sessions keep going in the background, so the timer carries on while your phone is locked or in your pocket. The activities are yours to shape. Set one up with a name, an icon, a color, a length, and how often you'd like a knock โ€” whether it's a morning routine, a bath, a study session, or anything you like. Keep the knock silent as a haptic, or add a sound. It's your rhythm. No loud alarms. Just a gentle nudge that keeps time from disappearing โ€” so you stay present and finish on time. FEATURES โ€ข Gentle knocks on Apple Watch or iPhone at your chosen interval โ€ข Run sessions on your iPhone alone โ€” no Apple Watch required โ€ข Sessions keep running in the background โ€ข Create your own activities โ€” name, icon, color, duration, and knock interval โ€ข Silent by default, with an optional knock sound per activity โ€ข Session history and insights โ€ข Apple Watch complications and Control Center support โ€ข Beautiful, calm, water-inspired interface โ€ข Available in your language Perfect for: โ€ข ADHD and time blindness โ€ข Focused work and study blocks โ€ข Morning routines and getting ready on time โ€ข Shorter, more mindful showers โ€ข Calm, distraction-free days Stay aware. Finish on time.

About

ShowerChallenge

Features
Read full description

Turn your morning shower into a game you actually want to win. The Shower Challenge helps you take shorter showers without it ever feeling like a chore. Pick a challenge, step in, and race the clock โ€” then watch your streak grow and your water use shrink, one morning at a time. HOW IT WORKS Choose how you want to play today, start the timer when the water goes on, and stop it when you're done. That's it. Every shower becomes a small, satisfying win. CHALLENGE MODES Time It โ€” Set a time goal and beat it. Perfect for building the habit at your own pace. One Song โ€” Play a track and finish before it ends. Your shower, your soundtrack, your deadline. Navy Style โ€” Ultra-quick, hard mode. Water on, rinse, water off โ€” for when you want to go pro. SEE YOUR PROGRESS Track every shower with clean, friendly charts. Watch your day-streak climb, see how your times trend over the weeks, unlock milestones, and get a running tally of how much faster you've become since week one. Small changes add up fast โ€” and the app makes them impossible to miss. WHY SHORTER SHOWERS? The average shower sends gallons of clean water down the drain. Trimming even a couple of minutes a day saves water, saves energy, and lowers your bill โ€” and it feels great. The Shower Challenge makes that good habit playful instead of preachy. DESIGNED TO DELIGHT Beautiful, distraction-free design that looks great in light and dark mode Smooth, encouraging animations โ€” never nagging Accessible with Dynamic Type and VoiceOver support Private by design: your shower data stays on your device Ready to save water, together? Take your first challenge tomorrow morning.

Screenshots

ShowerChallenge4 screens

Verdict

The call

The clearest difference is in-app purchases: ShowerChallenge at none against RosaKnock's 1. On price, ads, device support and iOS requirement 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. RosaKnock sells 1 one-off in-app purchase. ShowerChallenge asks for nothing beyond the download.

Scorecard1 real difference ยท 5 level
RosaKnock versus ShowerChallenge: the parameters behind the verdict, then further details
ParameterRosaKnockShowerChallenge
PriceFreeFree
Update frequencyEvery 3 daysโ€”
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, Apple Watch โ€” betteriPhone
Requires iOS26.026.0
Further details โ€” not scored
Size114 MB11 MB
Age rating4+4+
DeveloperRosemary SolutionsWilliams Martinez

In-app purchases

1 purchases

RosaKnock

One-time1
  • Lifetime Unlock$2.99
None

ShowerChallenge

No in-app purchases

Questions

Is RosaKnock free?
RosaKnock is free to download, with in-app purchases available.
Is ShowerChallenge free?
ShowerChallenge is free to download, with no in-app purchases.
Do RosaKnock or ShowerChallenge have ads?
Neither RosaKnock nor ShowerChallenge shows ads.

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