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    <title>Android on Blackratel Blog</title>
    <link>https://blackratel.com/blog/en/tags/android/</link>
    <description>Recent content in Android on Blackratel Blog</description>
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    <language>en</language>
    <copyright>© 2026 blackratel</copyright>
    <lastBuildDate>Wed, 29 Apr 2026 00:00:00 +0000</lastBuildDate><atom:link href="https://blackratel.com/blog/en/tags/android/index.xml" rel="self" type="application/rss+xml" />
    
    <item>
      <title>I Made a Slot Brick Breaker App</title>
      <link>https://blackratel.com/blog/en/posts/blockbreaker/</link>
      <pubDate>Wed, 29 Apr 2026 00:00:00 +0000</pubDate>
      
      <guid>https://blackratel.com/blog/en/posts/blockbreaker/</guid>
      <description>&lt;p&gt;I made a brick breaker game (slot brick breaker) with slot machine power-ups.&#xA;In Relax Mode, items drop frequently for a smooth and satisfying experience.&#xA;If that feels too easy, give Hard Mode a try.&lt;/p&gt;&#xA;&lt;p&gt;Break bricks, grab items, and spin the slots to power up — simple gameplay you&amp;rsquo;ll keep coming back to.&lt;/p&gt;&#xA;&lt;lite-youtube videoid=&#34;MAzXZB0iGgw&#34; playlabel=&#34;MAzXZB0iGgw&#34; params=&#34;&#34;&gt;&lt;/lite-youtube&gt;&#xA;&#xA;&#xA;&lt;h2 class=&#34;relative group&#34;&gt;How to Play&#xA;    &lt;div id=&#34;how-to-play&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#how-to-play&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h2&gt;&#xA;&lt;ul&gt;&#xA;&lt;li&gt;Slide the paddle left and right to bounce the ball&lt;/li&gt;&#xA;&lt;li&gt;Break all the bricks to clear the stage&lt;/li&gt;&#xA;&lt;/ul&gt;&#xA;&#xA;&lt;h2 class=&#34;relative group&#34;&gt;Features&#xA;    &lt;div id=&#34;features&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#features&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h2&gt;&#xA;&lt;p&gt;&lt;strong&gt;Slot-powered upgrades&lt;/strong&gt;&#xA;The slot spins as the ball passes through. Land multi-ball, pierce shots, giant ball, and more — luck is on your side.&lt;/p&gt;</description>
      
    </item>
    
    <item>
      <title>I Made a Gem Sort Puzzle App</title>
      <link>https://blackratel.com/blog/en/posts/gemsortpuzzle/</link>
      <pubDate>Mon, 27 Apr 2026 00:00:00 +0000</pubDate>
      
      <guid>https://blackratel.com/blog/en/posts/gemsortpuzzle/</guid>
      <description>&lt;p&gt;I made a gem sorting puzzle game(&amp;ldquo;gem sort puzzle&amp;rdquo;). Give it a try if you like.&lt;/p&gt;&#xA;&lt;p&gt;Sort the mixed gems back into tubes of matching colors — one tap at a time!&lt;/p&gt;&#xA;&lt;div style=&#34;display:flex; gap:8px; margin:1em 0;&#34;&gt;&#xA;&lt;img src=&#34;https://blackratel.com/blog/images/gemsortpuzzle_01.png&#34; style=&#34;flex:1; width:0; height:auto; object-fit:cover;&#34; loading=&#34;lazy&#34;&gt;&#xA;&lt;img src=&#34;https://blackratel.com/blog/images/gemsortpuzzle_02.png&#34; style=&#34;flex:1; width:0; height:auto; object-fit:cover;&#34; loading=&#34;lazy&#34;&gt;&#xA;&#xA;&lt;/div&gt;&#xA;&#xA;&lt;p&gt;No ads between stages, so you can stay focused on the puzzles.&lt;/p&gt;&#xA;&#xA;&lt;h2 class=&#34;relative group&#34;&gt;How to Play&#xA;    &lt;div id=&#34;how-to-play&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#how-to-play&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h2&gt;&#xA;&lt;ul&gt;&#xA;&lt;li&gt;Tap a tube to select the top gem, then tap another tube to move it&lt;/li&gt;&#xA;&lt;li&gt;You can only move gems onto the same color or into an empty tube&lt;/li&gt;&#xA;&lt;li&gt;Fill every tube with a single color to clear the stage!&lt;/li&gt;&#xA;&lt;/ul&gt;&#xA;&#xA;&lt;h2 class=&#34;relative group&#34;&gt;Features&#xA;    &lt;div id=&#34;features&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#features&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h2&gt;&#xA;&lt;p&gt;&lt;strong&gt;Simple controls&lt;/strong&gt;&#xA;One-tap operation anyone can pick up instantly. A built-in tutorial walks you through your first stage.&lt;/p&gt;</description>
      
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      <title>I Made a Gemstone Oracle Card App</title>
      <link>https://blackratel.com/blog/en/posts/oraclecard01/</link>
      <pubDate>Sun, 26 Apr 2026 00:00:00 +0000</pubDate>
      
      <guid>https://blackratel.com/blog/en/posts/oraclecard01/</guid>
      <description>&lt;p&gt;I made a gemstone oracle card app. Give it a try if you like.&lt;/p&gt;&#xA;&lt;div style=&#34;display:flex; gap:8px; margin:1em 0;&#34;&gt;&#xA;&lt;img src=&#34;https://blackratel.com/blog/images/oraclecard01_01.webp&#34; style=&#34;flex:1; width:0; height:auto; object-fit:cover;&#34; loading=&#34;lazy&#34;&gt;&#xA;&lt;img src=&#34;https://blackratel.com/blog/images/oraclecard01_02.webp&#34; style=&#34;flex:1; width:0; height:auto; object-fit:cover;&#34; loading=&#34;lazy&#34;&gt;&#xA;&lt;img src=&#34;https://blackratel.com/blog/images/oraclecard01_03.webp&#34; style=&#34;flex:1; width:0; height:auto; object-fit:cover;&#34; loading=&#34;lazy&#34;&gt;&#xA;&#xA;&lt;/div&gt;&#xA;&#xA;&lt;p&gt;I wanted to build something that could offer a quiet moment of reflection — in the morning, before a big decision, or when you&amp;rsquo;re unsure about matters of the heart. That&amp;rsquo;s the feeling I had in mind while making this app.&lt;/p&gt;&#xA;&#xA;&lt;h2 class=&#34;relative group&#34;&gt;What You Can Do&#xA;    &lt;div id=&#34;what-you-can-do&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#what-you-can-do&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h2&gt;&#xA;&lt;p&gt;Three types of readings are available.&lt;/p&gt;</description>
      
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      <title>I Made a Mahjong Score Calculator App</title>
      <link>https://blackratel.com/blog/en/posts/mahjongcalc/</link>
      <pubDate>Sun, 26 Apr 2026 00:00:00 +0000</pubDate>
      
      <guid>https://blackratel.com/blog/en/posts/mahjongcalc/</guid>
      <description>&lt;p&gt;I made a mahjong score calculator app. Feel free to give it a try.&lt;/p&gt;&#xA;&lt;p&gt;&amp;ldquo;Wait, how many points is this hand?&amp;rdquo; — I built this app for exactly that moment during a game. It shows you the yaku and score, but the standout feature is that &lt;strong&gt;Zundamon reads the results aloud&lt;/strong&gt;.&lt;/p&gt;&#xA;&#xA;&lt;h2 class=&#34;relative group&#34;&gt;How to Use&#xA;    &lt;div id=&#34;how-to-use&#34; class=&#34;anchor&#34;&gt;&lt;/div&gt;&#xA;    &#xA;    &lt;span&#xA;        class=&#34;absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none&#34;&gt;&#xA;        &lt;a class=&#34;text-primary-300 dark:text-neutral-700 !no-underline&#34; href=&#34;#how-to-use&#34; aria-label=&#34;Anchor&#34;&gt;#&lt;/a&gt;&#xA;    &lt;/span&gt;&#xA;    &#xA;&lt;/h2&gt;&#xA;&lt;p&gt;If you have called tiles, start by entering the counts for ankan, minkan, pon, and chi. Then tap the tile images to input your hand.&lt;/p&gt;</description>
      
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