Letters｜友人・知人への紹介＆口コミを広げて売上アップ vs Simple Affiliatefor Shopify (2026)
Letters｜友人・知人への紹介＆口コミを広げて売上アップ (hereafter referred to as Letters) positions itself as a user-friendly referral program app specifically tailored for the Japanese market, emphasizing easy setup and word-of-mouth marketing. Its headline highlights a significant number of successful referrals and conversion rates among active stores, suggesting a focus on driving immediate sales growth through existing customers. Simple Affiliate, on the other hand, is presented as a comprehensive, automated affiliate platform for managing influencer and referral marketing programs, targeting merchants seeking a more robust and scalable solution for managing a larger affiliate network. It focuses on features like affiliate account management, flexible commissions, and automated tax handling.
At a Glance
Letters｜友人・知人への紹介＆口コミを広げて売上アップ
24 reviews
Simple Affiliate
82 reviews
Detailed Overview
Letters｜友人・知人への紹介＆口コミを広げて売上アップ
【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】
Key Features
- ＜かんたん導入＞ 日本語、コード不要で簡単にどなたでも簡単に導入可能です。テキストを編集するだけですぐに紹介プログラムを実装することができます。
- ＜費用対効果の向上＞ 月額利用料(30日間無料)と成果報酬のみのアフィリエイト型課金モデルのためリスクフリーで新しいマーケティング施策を導入可能です。
- ＜新規の顧客獲得の強化＞ 既存顧客から新しい顧客へと自然に広がる紹介プログラムで、新規顧客の獲得を強力にサポートします。信頼性の高い口コミでブランド認知を拡大。
- ＜アフィリエイトの還元ツールとしても機能＞ インフルエンサーや既存顧客を活用し、手軽にアフィリエイトのツールとして代替することも可能です。
- ＜柔軟なインセンティブ設定＞ 紹介インセンティブはギフト券や寄付など、ニーズに合わせて柔軟に設定可能。社会貢献型のキャンペーンの設定などのアレンジも可能です。
Simple Affiliate
Drive Sales With an Automated Affiliate Platform to Manage Influencer & Referral Marketing Programs
Key Features
- New Customer Accounts: Register & sign in directly from your store
- Track Sales & Payouts: Affiliates can track commission rates & total sales
- Flexible Reward Structures: Based on products, variants, categories, codes, etc.
- Manage Taxes: All 1099 tax forms are easily handled, automated & consolidated
- Reward Payout: Manually or auto-pay sales commissions based on your preferences
Feature Comparison
| Rating | 4.2/5 | 5/5 |
Rating Letters｜友人・知人への紹介＆口コミを広げて売上アップ4.2/5 Simple Affiliate5/5 | ||
| Reviews | 24 | 82 |
Reviews Letters｜友人・知人への紹介＆口コミを広げて売上アップ24 Simple Affiliate82 | ||
| Target Market | Japanese Market (explicitly implied) | General Market |
Target Market Letters｜友人・知人への紹介＆口コミを広げて売上アップJapanese Market (explicitly implied) Simple AffiliateGeneral Market | ||
| Ease of Use | Very Easy (Code-free, Japanese) | Easy (but likely assumes some familiarity with affiliate marketing) |
Ease of Use Letters｜友人・知人への紹介＆口コミを広げて売上アップVery Easy (Code-free, Japanese) Simple AffiliateEasy (but likely assumes some familiarity with affiliate marketing) | ||
| Affiliate Management | Limited - focuses on existing customer referrals | Extensive - manages unlimited affiliates, groups, coupons, etc. |
Affiliate Management Letters｜友人・知人への紹介＆口コミを広げて売上アップLimited - focuses on existing customer referrals Simple AffiliateExtensive - manages unlimited affiliates, groups, coupons, etc. | ||
| Tax Management | Not mentioned | Automated 1099 tax form handling |
Tax Management Letters｜友人・知人への紹介＆口コミを広げて売上アップNot mentioned Simple AffiliateAutomated 1099 tax form handling | ||
| Incentive Flexibility | Flexible (gift cards, donations, etc.) | Flexible (product-based commissions, etc.) |
Incentive Flexibility Letters｜友人・知人への紹介＆口コミを広げて売上アップFlexible (gift cards, donations, etc.) Simple AffiliateFlexible (product-based commissions, etc.) | ||
| Pricing Model | Monthly fee (30-day free trial) + performance-based commission | Not specified, but likely subscription-based |
Pricing Model Letters｜友人・知人への紹介＆口コミを広げて売上アップMonthly fee (30-day free trial) + performance-based commission Simple AffiliateNot specified, but likely subscription-based | ||
| Customer Accounts | Not specified, assumes using existing customer base | Affiliates can register and sign in directly from store |
Customer Accounts Letters｜友人・知人への紹介＆口コミを広げて売上アップNot specified, assumes using existing customer base Simple AffiliateAffiliates can register and sign in directly from store | ||
Our Verdict
Letters is well-suited for smaller Shopify stores, particularly those targeting the Japanese market, that want a simple, low-risk way to leverage their existing customer base for referrals. Its easy setup and performance-based pricing make it an attractive option for merchants new to affiliate marketing or with limited technical expertise. Simple Affiliate is a better choice for larger or more established Shopify businesses that require a comprehensive affiliate marketing platform with advanced features like affiliate account management, tax handling, and flexible commission structures. Its ability to manage unlimited affiliates makes it scalable for growing businesses.
Common Questions
Which app is easier to set up and use?
Letters appears to be easier to set up, requiring no code and being designed for Japanese users. Simple Affiliate is also easy, but its broader feature set may require a slightly steeper learning curve.
Which app offers better tax management capabilities?
Simple Affiliate explicitly offers automated 1099 tax form handling, a feature not mentioned in Letters.
Which app is better for a store targeting the Japanese market?
Letters is explicitly designed for the Japanese market and offers its services in Japanese. Simple Affiliate could be used, but Letters has a distinct advantage.
Which app is more scalable for a rapidly growing business?
Simple Affiliate's ability to manage unlimited affiliates and its advanced features make it more scalable than Letters.
Which app has a better reputation based on reviews?
While Letters has a good rating (4.2/5), Simple Affiliate has a perfect 5/5 rating and significantly more reviews (82 vs 24), suggesting a stronger overall reputation.
Get More From Your Shopify Store
Run audits for SEO, CRO, PageSpeed, and AI visibility. Get a clear report and actionable fixes.
Try Fix My Store