Comparison

Water Eject vs Stackis RPN

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

Head to head
About

Water Eject

This app uses sound frequencies to clear water and debris from your iPhone speakers and earbuds. Get clearer calls and music in seconds with quick cleaning cycles and device-specific modes. It's designed for easy, on-device use after rain, workouts, or splashes.

Highlights
  • Sound pulses to remove moisture
  • Preset cycles for different devices
  • Visual and haptic guidance
  • One-tap Quick Clean (10-30s)
  • Deep Dry for heavy moisture
  • Earbud and Earpiece modes
  • Clean history tracking
Features
Read full description

Water Eject on your iPhone and your Apple Watch. Clear Speaker pushes water out of the speaker with a tuned low-frequency sweep. On iPhone it then listens with the microphone and repeats until the speaker sounds clear again. On Apple Watch it runs the sweep through the watch speaker, with the Digital Crown setting how strong it is. ON APPLE WATCH • Eject: a 100 to 300 Hz sweep through the watch speaker. The ring pulses with the sweep, the Digital Crown sets the intensity, and a drip haptic plays when the routine finishes. • Speaker test: short tones to hear whether the speaker sounds right afterwards. • Dry timer: mirrors the timer running on your iPhone. • Water Lock: turn on Apple's Water Lock first, then run Clear Speaker as the deeper clean. • History: every eject on the watch is logged and shows in History on your iPhone. • Complication: Start eject from the watch face. It flips to Clean for 12 hours after a finished eject. • Siri: start a water eject on your watch, or ask how long since your last clean. • The watch app runs on its own, without your iPhone nearby. No ads. No paywall. Nothing ever blocks the eject button. Every feature below is free, and the app never interrupts you while your phone is wet. WHY EJECT SOMETIMES "DOESN'T WORK" Most of the time it is not the tone - it is the setup. Before every cycle, Clear Speaker runs a preflight check and tells you if: - your volume is turned down - your audio is routed to AirPods, a car, or a Bluetooth speaker Fix it in one tap and start. This single check is the difference between water coming out and nothing happening. WHAT IT CLEARS - iPhone and Apple Watch speaker after rain, a pool, a sink, or a spill - AirPods and earbuds - left, right, or alternating so each bud gets its own cycle - Charging port - a dedicated drying mode for a wet Lightning or USB-C port DRY-OUT TIMER The speaker clears in a minute, but a wet charging port needs time. Start a dry-out timer after an eject - 30 minutes for a splash, 2 hours if the phone went in the water, a day if the liquid alert came back - and Clear Speaker tells you when it's time to try the cable again. Or just ask Siri: "Can I charge my phone yet with Clear Speaker?" MEASURE IT, DON'T GUESS The clarity check uses the microphone to score how your speaker actually sounds - a real measurement, not a number we made up. Run it before and after so you can hear and see the difference. The left/right speaker test confirms both channels are working. ONE TAP FROM ANYWHERE ON IPHONE - Home Screen and Lock Screen widgets - Control Center control - Action Button - Siri and Shortcuts: "Eject water with Clear Speaker" - Live Activity shows the cycle running while you dry the phone off BUILT FOR A WET PHONE IN YOUR HAND - Big target you can hit with damp fingers - Haptics and a visual meter so you know it is working - Works fully on device - no account, no sign-up, no internet needed - Nothing leaves your phone - Dark and light themes, full VoiceOver support - Available in English, Arabic, German, Spanish, French, Italian, Japanese, Portuguese, Russian and Simplified Chinese HOW TO USE IT 1. Turn the volume up and unplug headphones (the app will remind you). 2. Hold the phone with the speaker pointing down; hold earbuds with the mesh facing down. 3. Press Eject and let it repeat until the app reports clear. 4. Wipe the phone and run the clarity check to confirm. GOOD TO KNOW On iPhone and Apple Watch, sound-based ejection helps push out surface water and loosen debris. It is preventive care, not a hardware repair, and it is not a medical or waterproofing device. If your device has been fully submerged, power it off and let it dry before running long cycles. Keep the volume at a comfortable level.

About

Stackis RPN

A calculator designed for users who prefer Reverse Polish Notation (RPN). It offers a familiar interface for RPN users and includes support for duodecimal calculations.

Highlights
  • RPN calculation style
  • Duodecimal (dozenal) support
  • Familiar interface for RPN users
  • Simple and pleasant user experience
Features
Read full description

This is an RPN calculator in the style of, for instance, old HP models. It will feel familiar if you are used to RPN, otherwise it will probably be a little confusing at first. It's not programmable and it doesn't try to mimic older hardware; it's just meant to be a pleasant calculator for those who prefer to use RPN. Also, if you want to perform calculations in duodecimal (dozenal), this app is for you!

Screenshots

Water Eject4 screens
Stackis RPN4 screens

Verdict

The call

The clearest difference is price: Stackis RPN at Free against Water Eject's $0.99. Stackis RPN also leads on update cadence (every 4 days vs every 8 days) and iOS requirement (17.6 vs 26.0). Water Eject's advantage is in-app purchases (none vs 1). On rating, ratings volume, 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

Stackis RPN is free to download; Water Eject costs $0.99 up front. Stackis RPN sells 1 one-off in-app purchase. Water Eject asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Water Eject against 5.0 for Stackis RPN. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Water Eject ships an update every 8 days, Stackis RPN every 4 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
Water Eject versus Stackis RPN: the parameters behind the verdict, then further details
ParameterWater EjectStackis RPN
Price$0.99Free — better
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings12 — better
Update frequencyEvery 8 daysEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS26.017.6 — better
Further details — not scored
Size14 MB10 MB
Age rating4+4+
DeveloperHemal ModiSkimra

Customer experience

Water Eject

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Stackis RPN

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Water Eject

No in-app purchases

1 purchases

Stackis RPN

One-time1
  • Advanced Mode$1.99

Questions

Is Water Eject free?
Water Eject costs $0.99, with no in-app purchases.
Is Stackis RPN free?
Stackis RPN is free to download, with in-app purchases available.
Which has better reviews, Water Eject or Stackis RPN?
Water Eject and Stackis RPN are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Water Eject or Stackis RPN have ads?
Neither Water Eject nor Stackis RPN shows ads.
Which is updated more often, Water Eject or Stackis RPN?
Water Eject ships an update every 8 days, and Stackis RPN every 4 days. Most recently, Water Eject was updated on October 24, 2026 and Stackis RPN on October 12, 2026.

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