Letters｜友人・知人への紹介＆口コミを広げて売上アップ

Shopify affiliate programs app by Letters Inc.·【紹介購入成立件数、累計25,000件突破！アクティブ店舗の一店舗当たりの月間CVは平均14件以上】

Snapshot

4.50(23 reviews)#33of 225 inAffiliate programs

Ongoing.AI tracks Letters｜友人・知人への紹介＆口コミを広げて売上アップ daily — category rank, keyword positions in App Store search, install footprint, listing changes, and reviewer sentiment — back to when we first observed the listing.

CategoriesAffiliate programs

Rating

4.50

23 reviews

Pricing

From $39/mo

free_trial

Built for Shopify

No

Years live

7

launched Apr 15, 2019

Last updated

Jun 29, 2026

Shopify listing

Catalog position

Where Letters｜友人・知人への紹介＆口コミを広げて売上アップ sits in the App Store.

Rank and percentile inside the Affiliate programs category — the competitive shape of the niche around this app.

Rank in Affiliate programs

#33

of 225 active apps

Review count percentile

86th

vs category siblings

Rating percentile

66th

vs category siblings

Years on App Store

7

since 2019

Listing change cadence

What Letters｜友人・知人への紹介＆口コミを広げて売上アップ has changed lately.

Every pricing tweak, tagline refresh, and Shopify-side listing ping. Captured from Ongoing.AI’s per-scrape diff log — the cadence and the content of changes, in one strip.

Listing changes · last 21 days+15shopify_lastmod: 2026-06-05 → 2026-06-16shopify_lastmod: 2026-06-16 → 2026-06-24shopify_lastmod: 2026-06-24 → 2026-06-26shopify_lastmod: 2026-06-26 → 2026-06-29Jun 10, 26Jun 21, 26Jul 1, 26

Shopify Lastmod · Jun 30

2026-06-26 → 2026-06-29

Shopify Lastmod · Jun 27

2026-06-24 → 2026-06-26

Shopify Lastmod · Jun 25

2026-06-16 → 2026-06-24

PricingIdentity & listingCadence

Reviews

What merchants are saying

4.50(23 reviews)
  • 97%positive31
  • 0%neutral0
  • 3%negative1

Popular mentions

  • ease of use
  • feature request

Top themes

  1. ease of use1
  2. feature request1

What merchants praise

“以前より使用しておりますが、紹介プログラムを簡単に導入することができて、非常に良いアプリだと思います。 紹介ページの自由度はありませんが、ノーコードで誰でも編集できるため、専門知識がなくても問題なくページを作成することができます。”
Nature Store · 5★ · 2023-03-29

What merchants complain about

“顧客に見込み客を紹介をしてもらうのに、まず顧客にレターズのリクルートメッセージを送り、顧客にアンバサダーに登録してもらう必要がある。 その一手間が顧客にとって煩わしく、ハードルが高いと思う。 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。”
淺野屋健一 · 2★ · 2024-10-02

Plans

Letters｜友人・知人への紹介＆口コミを広げて売上アップ pricing tiers.

【LIGHT】39$〜/月

$39/month

  • 初回30日間無料でお試し体験いただけます。Letters経由売上の3.3%がコミッションフィーとして別途従量課金されます。各プラン最大請求金額を設けており、総額（Monthly fee+Commission fee）が【LIGHT 月$4,000】が上限となります。

【STANDARD】249$〜/月

$249/month

  • 初回30日間無料でお試し体験いただけます。Letters経由売上の1.3%がコミッションフィーとして別途従量課金されます。各プラン最大請求金額を設けており、総額（Monthly fee+Commission fee）が【STANDARD 月$2,666】が上限となります。

【PRO】689$〜/月

$689/month

  • 初回30日間無料でお試し体験いただけます。Letters経由売上の0.5%がコミッションフィーとして別途従量課金されます。各プラン最大請求金額を設けており、総額（Monthly fee+Commission fee）が【PRO 月$1,666】が上限となります。

Capabilities

What Letters｜友人・知人への紹介＆口コミを広げて売上アップ can do.

The 13 capabilities Letters｜友人・知人への紹介＆口コミを広げて売上アップ lists across its category, in Shopify’s own taxonomy. Pulled directly from the App Store listing.

Commission options

3
  • Automated rules
  • Performance bonuses
  • Tiered benefits

Referral management

2
  • Affiliate links
  • Email tracking

Affiliate experience

5
  • Custom dashboards
  • Page creation
  • Custom registration
  • Custom links and discounts
  • Custom branding

Payments

3
  • Auto-payments
  • Card payouts
  • PayPal

FAQ

Letters｜友人・知人への紹介＆口コミを広げて売上アップ — frequently asked questions.

What is Letters｜友人・知人への紹介＆口コミを広げて売上アップ on Shopify?
Letters｜友人・知人への紹介＆口コミを広げて売上アップ is a Shopify app in the Affiliate programs category. | 国内紹介マッチングアプリNo.1 | 導入実績400店舗突破 | Shopify App Storeレビュー★4以上 | ⁡ 「Letters」は、既存顧客にブランドのアンバサダーになってもらい、気軽に友人、知人にブランドを紹介してもらえる仕組みを、自社ショップに手軽に導入できるアプリケーションです。. It averages 4.50 out of 5 across 23 merchant reviews on the Shopify App Store.
How much does Letters｜友人・知人への紹介＆口コミを広げて売上アップ cost?
Letters｜友人・知人への紹介＆口コミを広げて売上アップ has 3 paid plans on the Shopify App Store, starting at $39/month and going up to $689/month.
Is Letters｜友人・知人への紹介＆口コミを広げて売上アップ free?
No, Letters｜友人・知人への紹介＆口コミを広げて売上アップ is a paid Shopify app. Plans start at $39/month on the Shopify App Store.
When was Letters｜友人・知人への紹介＆口コミを広げて売上アップ launched?
Letters｜友人・知人への紹介＆口コミを広げて売上アップ launched on April 15, 2019 — over 7 years on the Shopify App Store. In that time it has gathered 23 merchant reviews.
Is Letters｜友人・知人への紹介＆口コミを広げて売上アップ Built for Shopify?
Letters｜友人・知人への紹介＆口コミを広げて売上アップ does not currently carry Shopify's Built for Shopify badge. The badge is awarded to apps that meet Shopify's published standards for performance, ease of use, and merchant value — many high-quality apps operate without it.
What are the best Letters｜友人・知人への紹介＆口コミを広げて売上アップ alternatives?
Merchants commonly compare Letters｜友人・知人への紹介＆口コミを広げて売上アップ with UpPromote Affiliate Marketing, Referral Candy & Affiliate, BixGrow Affiliate Marketing, and Affiliate Marketing ReferrLy. Each alternative covers a similar use case but differs on pricing model, integration depth, and the specific themes merchants praise in reviews — see the alternatives section above for a side-by-side.
What complaints come up about Letters｜友人・知人への紹介＆口コミを広げて売上アップ?
3% of analyzed merchant reviews are negative. The pain points most often raised in critical reviews are ease of use and feature request — see the review fingerprint above for the per-merchant detail.

Alternatives

Apps merchants pick instead.

UpPromote

UpPromote Affiliate Marketing

4.90★3,468

ReferralCandy

Referral Candy & Affiliate

4.90★1,449

Known for: customer-support

BixGrow

BixGrow Affiliate Marketing

4.90★1,217

Known for: misleading-marketing

ReferrLy

Affiliate Marketing ReferrLy

5.00★974

Known for: customization

Browse more inAll Affiliate programs apps

Methodology

Where the numbers come from.

Ratings, review counts, pricing tiers, “Built for Shopify”, launch date, and category memberships come from the live Shopify App Store listing — refreshed daily by Ongoing.AI’s crawler. The review-count trajectory is the diff between today’s snapshot and snapshots from 7 and 28 days ago. Topic counts and sentiment come from the review corpus, topic-tagged with Claude. Install footprint is observed via Ongoing.AI’s tech-detection pass against actively-tracked Shopify storefronts. Catalog position is computed at snapshot time against every active app sharing the primary category. Snapshot generated .

Find every brand running Letters｜友人・知人への紹介＆口コミを広げて売上アップ.

Ongoing.AI tracks every Shopify brand’s app stack daily. Pull the full install list, filter by vertical or geography, and catch the moment merchants install — or churn off.

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