Comparison

Morster vs Undy

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

Head to head
About

Morster

This tool allows users to encode and decode Morse code using various input methods like a graphical key, camera light, or microphone sound. It offers features for learning Morse code, including references, charts, and interactive elements. Users can also communicate Morse code visually or audibly with others.

Highlights
  • Graphical interactive Morse key
  • Translate text to/from Morse code
  • Visual and audio Morse decoding via camera/microphone
  • Morse code reference and learning aids
  • Visual Morse communication with screen/flash
  • Multiplayer Morse communication via Wi-Fi/Bluetooth
Features
Read full description

Morster is the ultimate morse code tool for iOS devices. Morster can interpret morse code that is created using the key, light from the camera or sounds from the microphone. Playback morse code with configurable sound or lighting effects. Morster is rich with features for learning morse code. Feature List: Graphical Interactive Morse Key Includes short circuit lever Translate Mode - Translate text to and from morse code Morse Code reference, several forms of morse code reference Prosign Ready - Recognize or reference prosign codes QCode Ready - Recognize or reference QCodes Dichotomic View - Morse code relationship chart, great for learning Sticky Note - Display a list of morse code sequences for reference Playback morse code once or in a loop Visual Morse Decoder - Use the camera(s) to analyze morse code signals Audio Morse Decoder - Use the microphone to analyze morse code signals Visual Morse Communication Using screen effect or camera flash Notepad to display morse code Invert morse key function Game Center Ready - Morse with friends! Wifi / Blue Tooth - Morse with friends over Blue Tooth or local wifi network Configurable audio tone In depth help file included Visual Morse Decoder Morster can use the live camera feed to decipher morse code that is being signaled with light. The light source could be coming from a light, mirror or another version of Morster. Use the view finder to focus on the light source, adjust the sensitivity and the morse code will be translated and displayed in the notepad. This feature is only available on devices that have a camera and running iOS 4 or later. Speed tests using an iPhone 4 to signal an iPad 2, both running iOS 5, demonstrate decoding speeds upwards of 30 WPM. Audio Morse Decoder Morster can use the live audio feed to decipher morse code that is being generated using sound. The amplitude of the sound is used to trigger the morse key. When the sound is below the threshold, the key is released. The sound can be any sound, but must have a distinct beginning and end. Currently, Morster does not decipher morse code taps, where there is only the beginning of the signal and not the end. Speed tests using iPhone 4 to signal iPad 2, both running iOS 5, demonstrate decoding speeds upwards of 13 WPM. For faster decoding of morse code, we suggest professional hardware. This feature is processor intensive and performance will vary between devices. Morse Decoding Morster will analyze the speed that morse code is keyed and automatically adjust to interpret the code. This allows for slight variances in speed that will still be properly analyzed. Visual Morse Feature Devices that have a camera flash can use it to signal with morse code. When enabled pressing the morse key will also turn on the flash. When morse code is played back, the camera flash will be used in conjunction with the tone. A Visual Morse screen can be configured to use the screen to signal with morse code. The visual feature can use an image of a light bulb or a color. The shape can be circular or rectangular. Shutters can be used, with a modifiable shutter count and speed. This feature is only activated for morse playback. On supported devices, it is possible to use either feature or both at the same time. Translate Mode It is possible to enter text into the notepad and then convert it to morse code. It is also possible to use the morse code keyboard and enter morse code that can be translated to characters. Morse Code / Prosign / QCode / Dichotomomic View A list of morse code characters is provided in list form or as a sticky near the morse key. A list of Prosigns and QCodes are included. These are sequences of letters that have special meaning in different morse code applications. For example SOS = ...---... = Distress Message. A dichotomic view of morse code shows the relationship between characters of the alphabet.

About

Undy

This app simplifies complex texts, making them easy to understand. It helps you read and comprehend various documents, from medical notes to legal documents. Additionally, it offers assistance for clear English writing.

Highlights
  • Simplifies complex texts
  • Makes documents easy to read
  • Assists with English writing
  • Supports various document types
  • Free to use
Read full description

Find yourself stuck trying to understand complicated texts? Undy is here to help you out. Undy makes confusing texts clear and easy to read. Use Undy to read things on your own, like: - Doctor's notes - Textbooks - Important letters - News articles - Tax laws Bonus: Undy also helps you write clearly in English. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Morster4 screens
Undy4 screens

Verdict

The call

The clearest difference is price: Undy at Free against Morster's $3.99. Undy also leads on rating (5.0 vs 3.6) and update cadence (weekly vs every 10 months). Morster's advantage is in-app purchases (none vs 1) and ratings volume (5 vs 1). On ads 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

Undy is free to download; Morster costs $3.99 up front. Undy sells 1 in-app purchase, starting at $0.99 per month. Morster asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Undy holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Morster has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Morster ships an update every 10 months, Undy weekly. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

Scorecard8 real differences · 2 level
Morster versus Undy: the parameters behind the verdict, then further details
ParameterMorsterUndy
Price$3.99Free — better
Rating3.6 (5 ratings)5.0 (1 ratings) — better
Positive reviews42.3% of reviews—
Number of ratings5 — better1
Update frequencyEvery 10 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS8.0 — better18.1
Further details — not scored
Size78 MB43 MB
Age rating4+12+
DeveloperSunshine Valley SystemsBenjamin Moore

Customer experience

Morster

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews26 reviews
Positive42.3%
Neutral3.8%
Negative53.8%

Undy

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

In-app purchases

None

Morster

No in-app purchases

1 purchases

Undy

Subscriptions1
  • Monthly2 Months trial$0.991 Month

Questions

Is Morster free?
Morster costs $3.99, with no in-app purchases.
Is Undy free?
Undy is free to download, with in-app purchases available.
Which has better reviews, Morster or Undy?
Undy is rated higher. Morster averages 3.6 out of 5 from 5 ratings, while Undy averages 5.0 from 1 ratings.
Do Morster or Undy have ads?
Neither Morster nor Undy shows ads.
Which is updated more often, Morster or Undy?
Morster ships an update every 10 months, and Undy weekly. Most recently, Morster was updated on October 15, 2026 and Undy on October 9, 2026.

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