携帯シンク メールビューア(無料版) is a mobile mail viewer designed for Android users who have switched from a feature phone to an Android device. It allows users to access and view emails that were previously sent and received on their feature phone via the mail box. With the help of an SD card, users can easily transfer and view their emails on their Android device.

This app supports various features including decoration mail (HTML mail), attached images, and emoticons. It also offers a search function, allowing users to sort emails by address, subject, date, and time. Additionally, users can reply to emails through their installed mail software. One of the advantages of this app is that it does not consume internal storage capacity.

Please note that the free version of 携帯シンク メールビューア displays advertising (Google Mobile Ads). However, a paid version without ad display is also available. The paid version offers the same features as the free version, except for the absence of advertising. If you are satisfied with the free version, consider purchasing the paid version for an ad-free experience.