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Solving everyday tech and lifestyle questions — AI, smartphones, PCs, web, work, and life.

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Image illustration of transferring data to the cloud when the storage capacity of the smartphone is full

Can't do anything because your smartphone is full? 7 ways to free up space on your iPhone/Android right away

Are you having trouble with the “Storage is full” notification on your smartphone? From organizing photos, apps, and cache to using the cloud and using SD cards, we will explain 7 ways to increase free space on both iPhone and Android, in order of effectiveness.

2026.02.24佐藤理香

Image illustration of not being able to use radio apps on an old smartphone

スマホ・アプリ

How to listen to radio on an old smartphone that cannot install radiko | 5 alternative apps and tricks [2026 edition]

Explains how to listen to the radio on an old smartphone where radiko cannot be installed. We will introduce how to check the recommended OS requirements, 5 alternative apps such as RAJIRU★RAJIRU and WIZ RADIO, and tricks to listen to music in your browser.

2026.02.23佐藤理香

A comparison illustration of an old smartphone and a new smartphone. An error icon is displayed on older devices, and a check mark is displayed on newer devices.

スマホ・アプリ

Does the app say "not supported" on your old smartphone? How to identify the cause and 5 remedies [Android]

4 reasons why you can't install apps because Google Play says "Your device is not compatible with this version" and 5 solutions. Solve the problem of not being able to use LINE or radiko on a used or old Android smartphone.

2026.02.23佐藤理香

Image illustration of a smartphone whose screen is cracked and the electronic ticket cannot be displayed

スマホ・アプリ

Can't use Suma Ticket/Electronic Ticket due to smartphone malfunction? Reissue procedure by platform and 3 preparations to make in advance

We explain what to do when you can't display your electronic ticket (Smartphone, Law Ticket, TicketPla) due to a smartphone malfunction or model change, for each platform. We will also introduce you to identity verification on the day of admission and 3 things you should do in advance.

2026.02.23佐藤理香

Illustration of tapping the purchase button for a Kindle e-book on a smartphone

スマホ・アプリ

Can't buy books from the Kindle app on your smartphone? How to display the purchase button and how to purchase changed due to the new smartphone law [2026 edition]

Explains why you can't buy books from the Kindle app on your smartphone and how to use the "getbook" purchase button added under the new smartphone law that will come into effect in December 2025. We will introduce the purchase procedure and troubleshooting methods for both iPhone and Android.

2026.02.22佐藤理香

Image illustration of a person who cannot log in because their smartphone is broken and the SMS verification code does not arrive

スマホ・アプリ

Is your smartphone broken and you can't receive the SMS verification code? What to do when you can't log in and 5 things to prepare in advance

We will explain 5 ways to deal with the problem of not being able to log in because the SMS authentication code did not arrive when your smartphone is broken or lost, and 5 preventive measures to prevent this from happening again. We will introduce specific steps such as backup code, passkey, SIM replacement, etc.

2026.02.22佐藤理香

Image of what to do when your smartphone freezes or operates slowly

スマホ・アプリ

Why does my smartphone freeze or operate slowly? 6 causes and solutions you can try now [iPhone/Android]

There are six reasons why your smartphone freezes or runs slow, including insufficient storage, insufficient memory, and not updating the OS. We will explain in an easy-to-understand way how to deal with each iPhone and Android, as well as the criteria for deciding whether to initialize or replace the device.

2026.02.21佐藤理香

An image of the problem of not being able to send or receive messages on LINE

スマホ・アプリ

8 reasons why you can't send or receive messages on LINE and solutions you can try now [iPhone/Android]

We explain 8 causes and solutions for troubles where you can't send or receive messages on LINE for iPhone and Android. Covers common causes such as communication environment, app updates, reception refusal settings, and server failures.

2026.02.21佐藤理香

Image illustration of iCloud private relay connection error in Safari

スマホ・アプリ

5 causes of "Unable to connect to iCloud Private Relay from Safari" and solutions you can try now [iPhone/Mac]

Explaining 5 causes and solutions when the "Unable to connect to iCloud Private Relay" error occurs in Safari. This can be resolved by reviewing Wi-Fi, VPN, and settings.

2026.02.20佐藤理香

Illustration showing how to unlock the deceased's smartphone and deal with digital belongings

スマホ・アプリ

Can't unlock your smartphone after your parent passes away? Correct way to deal with digital belongings and settings to be done before death

After a parent passes away, the number of problems such as not being able to unlock a smartphone because one does not know the passcode is rapidly increasing. We will explain how to deactivate iPhone and Android, and the Apple Legacy Contact and Google account deactivation management tools that you should set up before you die.

2026.02.19佐藤理香

Illustration of a smartphone screen showing an error where videos cannot be saved on LINE

スマホ・アプリ

Can't save videos on LINE? 5 causes and what to do when the storage period has expired [iPhone/Android]

Explains the causes and solutions when videos received on LINE cannot be saved. Introducing solutions for five causes, including expired retention period, insufficient storage, and permission settings. Alternative methods after LINE Keep ends and how to use LYP Premium.

2026.02.19佐藤理香

Problem where drafts of X(Twitter) disappeared due to model change

スマホ・アプリ

All my drafts on X (Twitter) disappeared after changing the model! Thorough explanation of causes and countermeasures

All my drafts on X (Twitter) disappeared when I changed my smartphone model! Explains the reasons why it disappears, how to back it up, and how to use scheduled posts.

2026.02.157 min佐藤理香

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