Comparison

超シンプル書籍検索 vs Letterly

Q: Is 超シンプル 書籍検索 free?

超シンプル 書籍検索 is free to download, with no in-app purchases.

Q: Do 超シンプル 書籍検索 or Letterly have ads?

Both 超シンプル 書籍検索 and Letterly show ads.

Q: Which is updated more often, 超シンプル 書籍検索 or Letterly?

超シンプル 書籍検索 ships an update weekly, and Letterly every 10 days. Most recently, 超シンプル 書籍検索 was updated on November 3, 2026 and Letterly on November 5, 2026.

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Share feelings, find comfort.

Free

📚 Books

★ 5.04 ratingsView app →

About

超シンプル書籍検索

Features

Read full description

本を検索して詳細を確認することができるアプリです！予約開始している本をジャンルを絞って一覧で確認することもできるので、いち早くチェックすることができます！気になった商品をブックマークとして保存もできるので便利！

About

Letterly

Connect with others globally by anonymously sharing your thoughts and feelings. Receive a daily letter of empathy and comfort, and open up to someone new each day.

Highlights

Anonymous letter writing
Global connection
Daily empathy letters
Share feelings and thoughts
Find comfort and support

Features

Read full description

Letterly is a special place where you can share your thoughts anonymously with people around the world and exchange warm empathy and comfort. You'll receive a sincere letter from someone every day at 9 AM. And you too can open up to someone and share what's on your mind. Ready to write your first letter?

Screenshots

超シンプル書籍検索3 screens

Letterly4 screens

Verdict

The call

超シンプル書籍検索 and Letterly are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

超シンプル書籍検索 ships an update weekly, Letterly every 10 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

ScorecardNo meaningful differences

超シンプル書籍検索 versus Letterly: the parameters behind the verdict, then further details
Parameter	超シンプル書籍検索	Letterly
Price	Free	Free
Rating	—	5.0 (4 ratings) — better
Positive reviews	—	100.0% of reviews
Number of ratings	—	4 — better
Update frequency	Weekly — better	Every 10 days
Ads	Yes	Yes
In-app purchases	No	No
Monetization	—	Ad-supported
Devices	iPhone, iPad — better	iPhone
Requires iOS	16.0 — better	17.6
Further details — not scored
Size	20 MB	21 MB
Age rating	9+	17+
Developer	shimizu syoki	Dusonn Dubaal

In-app purchases

None

超シンプル書籍検索

No in-app purchases

None

Letterly

No in-app purchases

Questions

Is 超シンプル書籍検索 free?

超シンプル書籍検索 is free to download, with no in-app purchases.

Is Letterly free?

Letterly is free to download, with no in-app purchases.

Do 超シンプル書籍検索 or Letterly have ads?

Both 超シンプル書籍検索 and Letterly show ads.

Which is updated more often, 超シンプル書籍検索 or Letterly?

超シンプル書籍検索 ships an update weekly, and Letterly every 10 days. Most recently, 超シンプル書籍検索 was updated on November 3, 2026 and Letterly on November 5, 2026.