Comparison

Fill Up Bucket vs CW Decoder

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

Head to head
About

Fill Up Bucket

A retro-style puzzle game where you draw lines to redirect water flow into buckets. It offers a simple yet challenging experience for players seeking a brain-teasing challenge.

Highlights
  • Retro LCD style graphics
  • Draw lines to change water direction
  • Simple yet challenging gameplay
  • Puzzle-solving mechanics
Features
Read full description

Old LCD style Puzzle game. Simply draw some lines to change water flowing direction. Let it flow into the buckets. It is simple but challenging.

About

CW Decoder

This application uses AI for high-accuracy Morse code decoding. It offers real-time signal processing for steady performance in noisy conditions. A free version allows for short decoding sessions, while a paid upgrade provides unlimited use and advanced features.

Highlights
  • AI-driven decoding
  • Real-time signal processing
  • Adjustable speed and thresholds
  • Decodes letters, numerals, and prosigns
  • Built-in microphone input
  • USB-C audio input (full version)
  • Scrollable decoded text
Features
Read full description

A high-accuracy Morse code decoder An AI model now drives the decoding, raising the hit rate on real on-air signals. Sample-by-sample signal processing keeps it steady in noise. Try the free version first and hear what it can pull out of the band. ■ Free version vs. Full Version The decoding engine itself is free for everyone to try. [Free version] • Each decoding session runs up to 2 minutes (restart as often as you like) • Standard font • Audio input from the built-in microphone only → Ideal for trying the app out or checking a short QSO. [Full Version (paid add-on)] • No time limit — built for long ragchews and for leaving it running while you monitor • Font settings — pick the typeface and size that read best for you • USB-C audio input — wire it straight to your rig and decode without the room getting in the way → Recommended if you want it on the desk for real operating, or a study setup you never have to babysit. ■ Features and technology (Real-time decoding) • Speed range: 5–50 WPM (speed and thresholds adjust themselves) • Detection range: 400 Hz – 900 Hz (locks onto the strongest signal) (What it decodes) • Letters, numerals and punctuation • Prosigns, and characters run together the way operators actually send them (Audio input: built-in microphone or USB-C) • Built-in microphone: no cable, nothing to set up. Point it at the speaker and go. • USB-C input (Full Version): connect any USB Audio Class device with a cable and it is recognised on the spot. No driver, no settings screen to find. • Plugging in switches the input over automatically; unplugging hands it back to the built-in microphone. • Taking audio straight from your rig's headphone output or an audio interface keeps conversation, traffic and household noise out of the decode. (Input source indicator) • The icon at the top left of the screen shows which input is in use at a glance: Microphone icon — the built-in microphone Connector icon — a USB-C device (shown in blue) • Plug or unplug the cable and the icon follows along on its own. • Connect a USB device before purchasing and a small lock appears. Tap it for details about the Full Version. • In landscape the icon moves to the button row at the bottom. (Signal processing) • Band-pass filter: a narrow window that cuts everything you did not tune for • AGC: tracks changes in signal strength and rides out fading • Noise blanker: removes spike noise using median absolute deviation • State stabilisation: multi-sample buffering so noise does not trip a false element ■ Built for operating, not just demos • Scrollable text, so anything you missed is still there to go back to • Locks firmly onto the 400 Hz – 900 Hz range where CW actually lives • A visual read-out that backs up what your ears are doing • A direct USB-C connection to the rig gives you the same steady copy in the shack or out portable ■ Who it is for (New to Morse) For anyone curious about Morse who is not sure where to start. Hearing it and reading it at the same time means you can check yourself as you go, which makes the learning stick far faster. (Licensed amateurs) • Practice: compare the decode against your own copy and find the characters you keep missing • Contests: a second pair of ears on fast CW, and a way to check a log entry • Portable: leave the laptop at home. A phone is the whole receiving setup. • Direct connection: over USB-C the copy stays solid even somewhere noisy (Returning and experienced operators) As a backstop for ears that are not what they were, or simply to make a long watch less tiring. Strong filtering keeps weak and crowded signals readable. Note: USB-C audio input requires a device with a USB-C port (iPhone 15 or later, USB-C iPad models) and a USB Audio Class compatible device. Note: Microphone access is used only to analyse the signal. Nothing is recorded, stored or transmitted. Audio arriving over USB-C uses the same permission.

Screenshots

Fill Up Bucket4 screens
CW Decoder3 screens

Verdict

The call

The clearest difference is rating: Fill Up Bucket at 4.0 against CW Decoder's 2.0. Fill Up Bucket also leads on in-app purchases (none vs 1) and review sentiment (14% vs 0%). CW Decoder's advantage is ads (none vs shown) and update cadence (every 8 days vs every 17 months). On price, ratings volume 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

Both are free to download. CW Decoder sells 1 one-off in-app purchase. Fill Up Bucket asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fill Up Bucket holds the better App Store score, 4.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 14% of Fill Up Bucket's written reviews are positive against 0% of CW Decoder's.

UpkeepUpdate frequency

Fill Up Bucket ships an update every 17 months, CW Decoder every 8 days. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

Scorecard7 real differences · 3 level
Fill Up Bucket versus CW Decoder: the parameters behind the verdict, then further details
ParameterFill Up BucketCW Decoder
PriceFreeFree
Rating4.0 (1 ratings) — better2.0 (1 ratings)
Positive reviews14.3% of reviews — better0.0% of reviews
Number of ratings11
Update frequencyEvery 17 monthsEvery 8 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.2
Further details — not scored
Size81 MB12 MB
Age rating4+4+
DeveloperOscar TsangKeiya Chiba

Customer experience

Fill Up Bucket

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive14.3%
Neutral42.9%
Negative42.9%

CW Decoder

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Fill Up Bucket

No in-app purchases

1 purchases

CW Decoder

One-time1
  • Unlock Full Version$2.99

Questions

Is Fill Up Bucket free?
Fill Up Bucket is free to download, with no in-app purchases.
Is CW Decoder free?
CW Decoder is free to download, with in-app purchases available.
Which has better reviews, Fill Up Bucket or CW Decoder?
Fill Up Bucket is rated higher. Fill Up Bucket averages 4.0 out of 5 from 1 ratings, while CW Decoder averages 2.0 from 1 ratings.
Do Fill Up Bucket or CW Decoder have ads?
Fill Up Bucket shows ads; CW Decoder does not.
Which is updated more often, Fill Up Bucket or CW Decoder?
Fill Up Bucket ships an update every 17 months, and CW Decoder every 8 days. Most recently, Fill Up Bucket was updated on October 15, 2026 and CW Decoder on October 11, 2026.

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