WeekendApp Collection Disclaimer:

- The "WeekendApp" collection are fast developed applications.
- These apps don't have any ads / push notifications / analytics attached.
- They only have been tested on a single device (Samsung Galaxy SII - GT-I9100, Android 4.0.3).
- These apps won't be localized.
- These apps are not supposed to be maintained.

Kaleidoscope WeekendApp:

Kaleidoscope effect with rotation sensor (or touching the screen).
The pictures are generated as you rotate or touch the screen, there's no camera support or picture import, there's no export either.

Based on Kaleidos by Mihai Preda which is licensed under Apache license 2.0.

Learn to sight-read music with MusicTutor SightRead (MTSR). MTSR is a quiz game designed for music students, for learning to read (and write) music in an easy and pleasant way.

*
** Gameplay

MTSR includes some games, but all them work the same way:

1) The program ask a question, which is shown on a panel (question panel)
2) The user answers, using another panel (answer panel). If the answer is correct, a sound is played, corresponding to the question made; if not, a failure sound is played.

These are the included games:

1) Read staff: The programs draws a staff in question panel, and a note in its position. The user must answer with a keyboard.
2) Write staff: The program shows a note name in question panel. The user must answer using the answer panel (which draws a staff) dragging the note to its correct height.

*
** Game modes

1) Timed tests: during the selected time interval, the user answers questions. Correct and wrong answers are accounted, and when the time is over, a score (based on correct&wrong answers and time) is shown.
2) Study: the user answers questions without any time limit. In this mode, the "Learn" button is available, and it changes program behaviour.
3) Learn: in this mode, the user touches the answer panel, and the program shows the question (or questions) which would have been answered by given answer.

*
** Time options

Game time can be chosen. If "0" is chosen, the game has no time limit and "Learn" mode can be activated.

Stored results from previous tests can be shown.

*
** Notation Systems
- English (C, D, E, F, G, A, B)
- Italian (Do, Re, Mi, Fa, Sol, La, Si)
- German (C, D, E, F, G, A, H)

*
**

MTSR is designed to work in any screen orientation (portrait, landscape), and screen sizes (phone, tablet). Help is included.

Learn and enjoy with MSTR!

Learn to sight-read music with MusicTutor SightRead (MTSR). MTSR is a quiz game designed for music students, for learning to read (and write) music in an easy and pleasant way.

*
** Gameplay

The quiz games included in MTSR work this way:

1) The program ask a question, which is shown on a panel (question panel)
2) The user answers, using another panel (answer panel). If the answer is correct, a sound is played, corresponding to the question made; if not, a failure sound is played.

These are the included games:

1) Read staff: The programs draws a staff in question panel, and a note in its position. The user must answer with a keyboard (piano or buttons)
2) Write staff: The program shows a note name in question panel. The user must answer using the answer panel (which draws a staff) dragging the note to its correct height.
3) Key signature: The program shows a staff with some key signature, and the user must answer, choosing such key within a keyboard.

*
** Game modes

1) Timed tests: during the selected time interval, the user answers questions. Correct and wrong answers are accounted, and when the time is over, a score (based on correct&wrong answers and time) is shown.
2) Study: the user answers questions without any time limit. In this mode, the "Learn" button is available, and it changes program behaviour.
3) Learn: in this mode, the user touches the answer panel, and the program shows the question (or questions) which would have been answered by given answer.

*
** Notation Systems
- English (C, D, E, F, G, A, B)
- Italian (Do, Re, Mi, Fa, Sol, La, Si)
- German (C, D, E, F, G, A, H)

*
** Time options

Game time can be chosen. If "0" is chosen, the game has no time limit and "Learn" mode can be activated.

Stored results from previous tests can be shown.

*
** Key and Range options

Three clef types can be chosen:

1) Treble clef
2) Bass clef
3) Grand clef (union of Treble and Bass clefs)

For every one of the three clef types, a range can be chosen:

a) predefined, to be choosen between 6 ranges
b) manually defined by user

*
** Accidental options

There are three accidental modes:

1) Natural: only natural notes are to be asked
2) Simple: natural, flats and sharp notes can be asked
3) Key signature: questions are made, in the context of a key.

Natural mode has no associated options.

Simple accidentals asks natural or accidental notes. The user can choose between only sharps, only flats or both.

Key Signature mode lets the user choose one or more keys. If more than one key is chosen, every new question changes the key randomly.

In this mode, the user can choose between two question filters:
A) Diatonic: only notes belonging to the current key are asked.
B) Chromatic: any note will be asked (whether or not it belongs to current key).

*
** General options

For "Read Staff" game, the user can choose the type of keyboard for answering:
1) Piano keyboard (with or without note names on keys)
2) Buttons with note names.

The main difference between both keyboards lies on enharmonic notes.
With piano there is no difference between, for example, F# and Gb, but with buttons, they can be differenciated.

Sound volume is adjustable (and muteable)

User can choose the program behaviour when asking a question wrongly:
A) A new question is made, even when previous one has not been correctly answered.
B) The same question is repeated, until the users answers correctly.

*
**

MTSR is designed to work in any screen orientation (portrait, landscape), and screen sizes (phone, 7" tablet, 10" tablet). Help is included.

Learn and enjoy with MSTR!

Learn the notes on your guitar! MusicTutor FretMaster is designed to help you learn the correspondence between notes and positions in the fretboard.

The game shows a position on the fretboard. The goal is to enter the correct note for that position. If it is correct, another question is made.

The game can be timed. It counts correct and wrong answers, and when the time is over, it shows a score based on results. This can be thought as a 'test' or 'exam' mode.

For non-timed games, a 'learn' (or 'study') mode is available. When activated, entering notes makes the correspondenting position(s) to be shown on the fretboard.

It is possible to play with no accidentals (only natural notes). Notation can be CDE or DoReMi.

Length of fretboard can be short (frets 0-5) or long (frets 0 - 12).

There are additional bass presets for 4 or 5 string bass. The appearance and sound is bass-like. It is recommended to use headphones or external speakers for quality bass sound.

There is also a second game available, 'play'. The game presents a note (including octave number). The goal is to position the note correctly on the fretboard.

There are three notation systems available: English (CDEFGAB), Italian (DoReMiFaSolLaSi), German (CDEFGAH).

Learn the notes on your guitar! MusicTutor FretMaster is designed to help you learn the correspondence between notes and positions in the fretboard.

The game shows a position on the fretboard. The goal is to enter the correct note for that position. If it is correct, another question is made.

The game can be timed. It counts correct and wrong answers, and when the time is over, it shows a score based on results. This can be thought as a 'test' or 'exam' mode.

For non-timed games, a 'learn' (or 'study') mode is available. When activated, entering notes makes the correspondenting position(s) to be shown on the fretboard.

Notation can be CDE or DoReMi.

* * * * * * * *

This is the Lite Version of MusicTutor FretMaster. The full version features:
- Play game, quich requires to position notes on the fretboard.
- Full 12-fret fretboard.
- Fret/String range selection.
- Bass (4/5 strings) preset.
- Natural-only notes mode.
- Three notation systems: English (CDEFGAB), Italian (DoReMiFaSolLaSi), German (CDEFGAH).

GuitarFlex is a virtual guitar app which lets you play the guitar on your phone or tablet. It doesn't mind if you are a beginner or not, GuitarFlex is flexible because:

- You can play in three modes: solo, arpeggio, strum
- You can configure the fretboard with the chords of your choice, allowing you to play as many different songs as you like.

Solo: play melodies an riffs touching directly at a [fret, string] position. Play polyphonic (if your device is multitouch).

Arpeggio and Strum: configure a set of chords (or use one of the bundled sets) and play string-by-string (arpeggio) or strum the chord (strum).

You can create and edit sets of chords (presets). Use the bundled chords, or create more chords using the included chord figures. Chord figures are

transportable; just as you would move your hand up and down the fretboard, keeping the same relative positions.

There is a custom chord editor for creating ANY chord you want.

Six different guitar sounds: acoustic, classical and electric; both picked or fingered.

Beautifully animated string vibration looks like a real string.

Sound is usually better if you use headphones, or an external device. Try it!

GuitarFlex includes a manual explaining the different modes and options.

Permissions:
- INTERNET, ACCESS_NETWORK_STATE: for displaying ads.

Sing along your favourite songs with this great app!

MusePad lets you record your musical ideas on the go, with your phone or tablet, enabling you to write simple melodies or complex chords / rhythm patterns. It's perfect for musicians, students and music enthusiasts who want to write their ideas quickly, analyze and communicate them effectively.

MusePad uses a piano roll style grid for displaying notes, and a piano keyboard for input. You enter the notes using the piano and they appear on the note grid. After that, you can delete notes directly on the grid, or add more notes tapping on the grid.

At any time, you can play your song from any starting position. When playing, current note(s) will be lit both on note grid and piano keyboard, following the notes with a smooth scroll movement. You will love to watch the music play!

Features:
- Note grid with diatonic / chromatic modes and key signature
- Input notes with the piano keyboard, or placing them directly on the grid
- Polyphonic piano input (in multitouch devices) with 8 octaves, scrollable in small devices
- Unlimited undo / redo for correcting mistakes
- Playback with highlighting of notes in grid and piano
- Full navigation on the note grid, with pan & zoom
- Save and load songs, or export them as MIDI
- Cut / Copy / Paste / Transpose

This is the Lite version of MusePad. After trying it, you may want to purchase the Full version of MusePad, which lets you load and save your songs, and export them as MIDI; and has no ads.

More features will be added in the future. Stay tuned and enjoy MusePad!

Khali is a caleidoscope made of rotating strips of overlapping triangles. Occlusion of neighbor triangles produces complex, 'flowing' patterns.

Stare at center to maximize perception of occlusion patterns. Prepare to experience a fast whirl; or a slow, quiet flow: speed is controllable.

Also available as Live Wallpaper!

Infimines is a new version of the classic game Minesweeper. In this version, the board is infinite, but mines can be eliminated leaving mine-free zones (and populated with flowers).

The goal of the game is to locate mines, flag them, and removing them by leaving them isolated. Points are obtained by eliminating mines, the bigger the number of mines in a group, the higher the score in points.

This free version incluyes ads, and doesnt let the user choose skill level (percentage of mines). See full version (Infimines) for more details.

*Screen orientation, phones and tablets
This game has been designed for both phones and tablets. In vertical orientation, phone version is played, and in horizontal orientation, tablet version.

This game includes a complete help, which I include here:

*How to play
Your task in this game is to remove mines, as many as you can.
There are infinite tiles. Tiles can be in revealed or unrevealed state. If revealed, you can see that there is not a mine (if there was a mine, you would lose the game)
Tiles can be flagged without being revealed.
To remove mines, they must be: 1) flagged and 2) surrounded by digging around a mine, or a group of mines.
Mines may appear in groups. To remove groups of mines, all mines from group must be flagged, and all non-mine tiles must be revealed.
Removed mines will eventually turn into flowers, if enough distance is left from mines.

*Touch modes
Touching a revealed tile does nothing, but if you drag it you will drag the view. Use this to navigate around.
Touching an unrevealed tile is mode-dependant:

*Flag
Puts a flag on the tile, marking it as a mine. If the tile was already flagged, removes the flag.

*Dig
Reveals the tile. If there was a mine under the tile, you will lose the game.

*Zoom
In this mode, you simply drag the view. Use this mode to move around without worrying about flagging or digging unwanted tiles.
Also, if you use the two-finger zoom/pinch gesture you can zoom out to see a wider view.

*Fast Flag+Dig
First touch flags the tile. Second touch reveals it. The only thing you can\'t do is unflag a tile (use Flag mode for that).

*Numbers
A number on a tile gives information about how many mines are around.
"Around" means the 8 tiles surrounding a given tile.
The number ranges from 1 to 8 and counts the number of mines present in the 8 tiles surrounding the tile with the considered number.
In many cases, you can safely tell if an unrevealed tile is a mine, or not, specially in easier levels, with a lower percentage of mines.

Remove ads from GuitarFlex and support further development.

Installing this small app will remove the ad area from GuitarFlex panel, thus gaining screen space.

This app does not install any launcher icon, and GuitarFlex must be installed.

Infimines is a new version of the classic game Minesweeper. In this version, the board is infinite, but mines can be eliminated leaving mine-free zones (and populated with flowers).

The goal of the game is to locate mines, flag them, and removing them by leaving them isolated. Points are obtained by eliminating mines, the bigger the number of mines in a group, the higher the score in points.

Differences between this version and the free one:
*Skill level can be selected, choosing percentage of tiles with a mine.
*No ads panel.

*Screen orientation, phones and tablets
This game has been designed for both phones and tablets. In vertical orientation, phone version is played, and in horizontal orientation, tablet version.

This game includes a complete help, which I include here:

*How to play
Your task in this game is to remove mines, as many as you can.
There are infinite tiles. Tiles can be in revealed or unrevealed state. If revealed, you can see that there is not a mine (if there was a mine, you would lose the game)
Tiles can be flagged without being revealed.
To remove mines, they must be: 1) flagged and 2) surrounded by digging around a mine, or a group of mines.
Mines may appear in groups. To remove groups of mines, all mines from group must be flagged, and all non-mine tiles must be revealed.
Removed mines will eventually turn into flowers, if enough distance is left from mines.

*Touch modes
Touching a revealed tile does nothing, but if you drag it you will drag the view. Use this to navigate around.
Touching an unrevealed tile is mode-dependant:

*Flag
Puts a flag on the tile, marking it as a mine. If the tile was already flagged, removes the flag.

*Dig
Reveals the tile. If there was a mine under the tile, you will lose the game.

*Zoom
In this mode, you simply drag the view. Use this mode to move around without worrying about flagging or digging unwanted tiles.
Also, if you use the two-finger zoom/pinch gesture you can zoom out to see a wider view.

*Fast Flag+Dig
First touch flags the tile. Second touch reveals it. The only thing you can\'t do is unflag a tile (use Flag mode for that).

*Numbers
A number on a tile gives information about how many mines are around.
"Around" means the 8 tiles surrounding a given tile.
The number ranges from 1 to 8 and counts the number of mines present in the 8 tiles surrounding the tile with the considered number.
In many cases, you can safely tell if an unrevealed tile is a mine, or not, specially in easier levels, with a lower percentage of mines.

MusePad lets you record your musical ideas on the go, with your phone or tablet, enabling you to write simple melodies or complex chords / rhythm patterns. It's perfect for musicians, students and music enthusiasts who want to write their ideas quickly, analyze and communicate them effectively.

MusePad uses a piano roll style grid for displaying notes, and a piano keyboard for input. You enter the notes using the piano and they appear on the note grid. After that, you can delete notes directly on the grid, or add more notes tapping on the grid.

At any time, you can play your song from any starting position. When playing, current note(s) will be lit both on note grid and piano keyboard, following the notes with a smooth scroll movement. You will love to watch the music play!

Features:
- Note grid with diatonic / chromatic modes and key signature
- Input notes with the piano keyboard, or placing them directly on the grid
- Polyphonic piano input (in multitouch devices) with 8 octaves, scrollable in small devices
- Unlimited undo / redo for correcting mistakes
- Playback with highlighting of notes in grid and piano
- Full navigation on the note grid, with pan & zoom
- Save and load songs, or export them as MIDI
- Cut / Copy / Paste / Transpose

Multiple screen size configurations are available. Screen size is set initially to match your device's size, but you may use the big screen setting on a small device (using a pointer to help you press the tiny buttons) or the small screen setting on a big device.

Try before you buy! You can download the Lite version of MusePad, which has all the features of MusePad (except load, save and export).

More features will be added in the future. Stay tuned and enjoy MusePad!

FibFlow is a caleidoscope made of Fibonacci Spirals, with a smart palette animation that produces amazing flow patterns.

Stare at the center, and let the color patterns appear. Choose between 10 color presets and change animation speed.

You can test the free non-wallpaper version! Search for 'FibFlow Caleidoscope' or select 'View more applications' below.

KhaliLW shows an occlusive caleidoscope, made of rotating triangle strips which occlude themselves, creating interesting patterns.

Before deciding to purchase, try the free app "Khali Khaleidoscope" (Search it by name, or choose "View more applications" below). The visuals are the same, but it can't be set as wallpaper.