あとプラ：チェックアウトページ最適化 vs Checkout B | Checkout Upsells
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 14, 2026 for あとプラ：チェックアウトページ最適化, Nov 9, 2026 for Checkout B.
The short answer
- Paid plans start at $9/month for あとプラ：チェックアウトページ最適化 and $199/month for Checkout B.
- Checkout B lists 20 features あとプラ：チェックアウトページ最適化’s listing doesn’t mention, including Announcement bar, Click-through rates, Custom CSS.
Head to head
商品を購入してくれた顧客にお得な情報をあとからプラス。関連商品やセールの表示、サンクスページの編集で新たな体験機会を創出！
- United States
- Germany
- United Kingdom
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
BASIC
- · アップセルページ（購入後）での商品掲載
- · 決済・配送カスタマイズ
PLUS
- · ※Shopify Plusマーチャント様のみご利用いただけます
- · アップセルページ（購入後）での商品掲載
- · チェックアウト拡張
- · 決済・配送カスタマイズ
Checkout Plus
- · Access to all features
- · Advanced Branding (Custom CSS + Fonts)
- · Analytics
- · Checkout Upsells
- · Customize Thank you & Order Status Pages
- · Customize Thank you & Order Status Pages
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every feature商品購入時に、関連商品やお役立ち情報をあとからプラスして表示することで、追加購入の促進やキャンペーン情報の提供により、効率的な売上アップが期待できるアプリです。 「チェックアウト拡張」（Plusマーチャント限定） は、決済前の画面をカスタマイズできるため、よりスマートな顧客アプローチが可能に。商品の追加購入やアップグレードの提案、プライバシーポリシー同意チェックの設置など、アプリの設定で簡単に実現ができます。 「決済・配送カスタマイズ」（全プラン対応） は、顧客の購入履歴やカート内の商品に応じて、特定の決済方法や配送オプションを非表示にすることが可能。顧客のニーズに合わせた、より柔軟な購入体験を提供します。
Checkout Builder gives Shopify Plus merchants full control over Checkout with high-converting, extensible blocks. Add upsells, cross-sells, trust badges, custom messaging, dynamic content, and conditional logic—no code required. Built on Shopify Checkout Extensibility, it’s fast, secure, upgrade-safe, and fully compatible with Shopify updates.
- チェックアウトページがカスタマイズ可能。カート内の商品に合わせたアップセルの提案や、個別メッセージ、規約への同意などが設定可能（Plusマーチャントのみ）
- 購入時の状況（商品や金額、顧客タグなど）に応じて決済方法や配送方法の非表示などのカスタマイズが可能。顧客のニーズに応じた柔軟な決済と配送オプションの提供。
- 購入後の追加表示内で直接購入（追加注文）が可能！購入済商品の関連商品やまとめ買いなどの提案のほか、条件に合わせてクーポンやSNSといった情報の出し分けも。
- 注文状況ページ（サンクスページ）にコンテンツを追加！表示できるのはSNSやクーポン、おすすめ商品。ドラッグ＆ドロップで簡単に表示コンテンツの移動も可能。
- Increase revenue w/ ROI-focused elements: conditional upsells, upgrades, & more.
- Add your branding to checkout with our advanced branding editor & live preview.
- Increase conversion with free shipping upsells & dynamic content for trust.
- Incorporate custom fields for gift messages, delivery notes, etc.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  あとプラ：チェックアウトページ最適化 |  Checkout B |
|---|---|---|
| Detected stores | Not published | 95 |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Apparel & Accessories, Home & Garden, Electronics |
| Top store countries | Not published | United States, Germany, United Kingdom |
Reviews
| Measure | あとプラ：チェックアウトページ最適化 | Checkout B |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 6 |
| New reviews, 28 days | Not enough data | 0 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | あとプラ：チェックアウトページ最適化 | Checkout B |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $9/month(ahead) | $199/month |
| Longest free trial | 14 days | 7 days |
| Plans listed | 2 | 1 |
Listing
| Measure | あとプラ：チェックアウトページ最適化 | Checkout B |
|---|---|---|
| Shopify category rank | #553 | #164 |
| Shopify App Charts | Not on this week’s charts | #11 in Checkout - Other |
| Built for Shopify | No | No |
| Launched | Jan 28, 2022 | Sep 6, 2023 |
| Languages | 1 | 1 |
| Developer | Rewire Inc. | Checkout Builder |
FAQ
あとプラ：チェックアウトページ最適化 and Checkout B: common questions
- Is あとプラ：チェックアウトページ最適化 or Checkout B cheaper?
- Paid plans start at $9/month for あとプラ：チェックアウトページ最適化 and $199/month for Checkout B. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- あとプラ：チェックアウトページ最適化 lists 3 the others don’t mention, such as A/B testing, Subscription upgrade, Warranties. Checkout B lists 20 the others don’t mention, such as Announcement bar, Click-through rates, Custom CSS, Custom HTML. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 14, 2026 for あとプラ：チェックアウトページ最適化, Nov 9, 2026 for Checkout B; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 14, 2026 for あとプラ：チェックアウトページ最適化, Nov 9, 2026 for Checkout B. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.