Letters｜友人・知人への紹介＆口コミを広げて売上アップ
「Letters」は、Shopifyストア向けの国内No.1の紹介マーケティングツールです。コード不要で簡単に導入でき、口コミや紹介を通じて新規顧客を獲得し、売上アップが見込めます。顧客は紹介を通じて特典を得られるため、口コミが自然に広がりやすく、リピート率やLTVも向上。ROIを改善するツールとして利用されています。
The pitch, and what the numbers say
Letters｜友人・知人への紹介＆口コミを広げて売上アップ — Affiliate programs · https://hp.letters.co.jp/
Estimated revenue: reviews × installs-per-review × paying share × entry price; every input is on the full x-ray.
Why users leave
The free diagnosis shows the top complaint. The full brief has every cluster, the build ideas and the buyers.
Requires customers to receive recruitment message and register as ambassadors before referring; reviewer wants simpler direct discount-link sharing.
“個別の割引きリンクだけを伝えてもらうとかもっと簡単でシンプルなシステムにしなければ使いづらいアプリだと感じた。”In English: “I felt it is hard to use unless the system is made simpler, such as just sharing an individual discount link.”
What a challenger would build
Closest alternatives
Who is buying right now
No public buyer thread in the same market in the last 30 days. The scanner runs every 15 minutes.
Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.
How to read this
Sources: the product's public listing and reviews, its published price, and public forum threads. Revenue is an estimate unless marked verified by the founder; the formula and its inputs are on the full x-ray. Complaints are grouped by a language model and each quote is a verbatim excerpt, linked to the original review. Build difficulty is a model's reading of the listing and the complaints, not a measurement. Figures are a snapshot of Oct 30, 2026. Corrections: corrections.