Blog
How these apps work, and what to check before you install one
How these apps work, what a store listing cannot tell you, and the decisions behind them. Every claim here is checked against the code or the submitted metadata.
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Games
What a puzzle game subscription actually costs you
A $4.99 monthly puzzle game is $180 over three years. Here is the arithmetic, the three ways games charge, and how to work out which one you are in.
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Health & Sleep
How to mix sleep sounds that actually mask noise
Turning it up is the wrong lever. Masking works by covering the frequencies the noise lives in — which is a mixing problem, not a volume one.
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Tools
Add a loyalty card to your phone wallet
Most shops never made a wallet pass, so the Add-to-Wallet button does not exist. Here is what works on iPhone and Android, and what scanners need.
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Kids
What age can a child start sudoku?
Around four, on a 4×4 grid — much earlier than most people assume. The size of the grid decides the age, not the child's arithmetic.
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Health & Sleep
Where your health app data actually goes
A tracker does not need a server to store your readings. Here is how to read the store disclosures, and what an account requirement really tells you.
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Games
Are mahjong solitaire boards always solvable?
Most mahjong deals are shuffled at random, and a real share of those cannot be won at all. Here is how a board is made solvable, and how to tell.
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Tools
What ping, jitter and packet loss actually mean
A good ping depends entirely on what you are doing. Here is what each number measures, what counts as fine, and which one ruins a video call.
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Kids
What to check before installing a kids app
Both app stores tell you whether a kids app has ads, purchases and data collection. Here is exactly where each disclosure is, and what it leaves out.
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Health & Sleep
A blood pressure log your doctor can actually use
A list of numbers gets skimmed. Six columns, a consistent time of day and a one-page summary get read. Here is what makes the difference.
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Games
Block puzzle strategy: keep the board open
Most block puzzle guides list tips. There is really only one idea — always leave room for the worst piece you could be dealt. Here is how to apply it.
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Tools
Is it my Wi-Fi or the internet?
Four checks, in order, from your phone, with no terminal needed. Each one rules out a different piece, so you know who to restart or who to call.
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Kids
Offline games for kids: what "offline" really means
Most apps listed as offline still need a connection at some point. There are three different meanings, and one test that tells you which one you have.
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