diff --git a/README.md b/README.md
index 8b7ee4e475..b7f5ba63b8 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,8 @@ RSSHub 是一个轻量、易于扩展的 RSS 生成器，可以给任何奇奇
     -   腾讯云移动直播 SDK
     -   Bugly SDK
     -   fir.im 应用
-    -   App Store/Mac App Store
+    -   App Store/Mac App Store 应用更新
+    -   App Store/Mac App Store 价格更新（限免）
 -   bilibili
     -   番剧
     -   UP 主投稿
diff --git a/docs/README.md b/docs/README.md
index 7f13077013..c4239aa780 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -170,6 +170,20 @@ country, App Store 国家，必选，如 QQ 的链接为 https://itunes.apple.co
 
 id, App Store app id，必选，如 QQ 的链接为 https://itunes.apple.com/cn/app/qq/id444934666?mt=8，则 id 为 id444934666
 
+### App Store/Mac App Store 价格更新（限免） <Author uid="HenryQW"/>
+
+举例: [https://rsshub.app/appstore/price/cn/mac/id115244347](https://rsshub.app/appstore/price/cn/mac/id115244347)
+
+路由: `/appstore/price/:country/:type/:id`
+
+参数：
+
+country, App Store 国家，必选，如 Squash 的链接为 https://itunes.apple.com/cn/app/id1152443474，则 country 为 cn
+
+type, App 类型，必选, `iOS` 或 `mac`
+
+id, App Store app id，必选，如 Squash 的链接为 https://itunes.apple.com/cn/app/id1152443474，则 id 为 id115244347
+
 ## bilibili
 
 ### 番剧
diff --git a/docs/en/README.md b/docs/en/README.md
index 24d2c958a6..de3c291d53 100644
--- a/docs/en/README.md
+++ b/docs/en/README.md
@@ -7,7 +7,7 @@ sidebar: auto
 </p>
 <h1 align="center" class="logo">RSSHub</h1>
 
-> 🍰 Everything can be RSS
+> 🍰 Everything is RSSible
 
 RSSHub is a lightweight and extensible RSS feed aggregator, it's able to generate feeds from pretty much everything.
 
@@ -134,6 +134,32 @@ Parameters: platform
 | ------- | ------- | ---- | ------- | ------------ |
 | desktop | android | beta | nightly | android-beta |
 
+### App Store/Mac App Store Updates <Author uid="cielpy"/>
+
+Eg: [https://rsshub.app/appstore/update/us/id697846300](https://rsshub.app/appstore/update/us/id697846300)
+
+Route: `/appstore/update/:country/:id`
+
+Parameters：
+
+country, App Store Country, obtain from the app URL `https://itunes.apple.com/us/app/reeder-3/id697846300?mt=8`, in this case, `us`.
+
+id, App Store app id, obtain from the app URL `https://itunes.apple.com/us/app/reeder-3/id697846300?mt=8`, in this case, `id697846300`.
+
+### App Store/Mac App Store Price Drop Alert <Author uid="HenryQW"/>
+
+eg: [https://rsshub.app/appstore/price/cn/mac/id115244347](https://rsshub.app/appstore/price/cn/mac/id115244347)
+
+Route: `/appstore/price/:country/:type/:id`
+
+Parameters：
+
+-   country, App Store Country, obtain from the app URL https://itunes.apple.com/us/app/id1152443474, in this case, `us`.
+
+-   type, App type，either `iOS` or `mac`
+
+-   id, App Store app id, obtain from the app URL https://itunes.apple.com/cn/app/id1152443474, in this case, `id1152443474`.
+
 ## pixiv
 
 ### User Bookmark <Author uid="EYHN"/>
diff --git a/package.json b/package.json
index 1f7bbb40eb..4e4d3db058 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,7 @@
     "cheerio": "1.0.0-rc.2",
     "co-redis": "2.1.1",
     "crypto": "1.0.1",
+    "currency-symbol-map": "^4.0.4",
     "form-data": "^2.3.2",
     "git-rev-sync": "1.12.0",
     "googleapis": "32.0.0",
diff --git a/router.js b/router.js
index 6b106cf6a7..473998afcc 100755
--- a/router.js
+++ b/router.js
@@ -419,6 +419,7 @@ router.get('/imuseum/:city/:type', require('./routes/imuseum'));
 
 // AppStore
 router.get('/appstore/update/:country/:id', require('./routes/appstore/update'));
+router.get('/appstore/price/:country/:type/:id', require('./routes/appstore/price'));
 
 // Hopper
 router.get('/hopper/:from/:to?', require('./routes/hopper/index'));
diff --git a/routes/appstore/price.js b/routes/appstore/price.js
new file mode 100644
index 0000000000..1786f158ed
--- /dev/null
+++ b/routes/appstore/price.js
@@ -0,0 +1,43 @@
+const axios = require('../../utils/axios');
+const currency = require('currency-symbol-map');
+const config = require('../../config');
+
+module.exports = async (ctx) => {
+    const country = ctx.params.country;
+    const type = ctx.params.type.toLowerCase() === 'mac' ? 'macapps' : 'apps';
+    const id = ctx.params.id.replace('id', '');
+
+    const url = `https://buster.cheapcharts.de/v1/DetailData.php?&store=itunes&country=${country}&itemType=${type}&idInStore=${id}`;
+
+    const res = await axios({
+        method: 'get',
+        url: url,
+        headers: {
+            'User-Agent': config.ua,
+            Referer: `http://www.cheapcharts.info/itunes/${country}/apps/detail-view/${id}`,
+        },
+    });
+
+    const result = res.data.results.apps;
+
+    const item = [];
+
+    const title = `${country === 'cn' ? '限免提醒' : 'Price watcher'}: ${result.title} for ${type === 'macapps' ? 'macOS' : 'iOS'}`;
+
+    const link = `https://itunes.apple.com/${country}/app/id${id}`;
+
+    if (result.priceDropIndicator === -1) {
+        const single = {
+            title: `${result.title} is now ${currency(result.currency)}${result.price} `,
+            description: `<a href="${link}" target="_blank">Go to App Store</a>`,
+            link,
+            guid: country + id,
+        };
+        item.push(single);
+    }
+    ctx.state.data = {
+        title,
+        link: url,
+        item,
+    };
+};
diff --git a/routes/appstore/update.js b/routes/appstore/update.js
index ae2a9da81e..9dcf0f4304 100644
--- a/routes/appstore/update.js
+++ b/routes/appstore/update.js
@@ -19,20 +19,23 @@ module.exports = async (ctx) => {
 
     const titleTags = $('h1').attr('class', 'product-header__title');
     titleTags.find('span').remove();
+    const platform = $('.we-localnav__title__product').text();
+
+    const title = `${titleTags.text()} for ${platform === 'App Store' ? 'iOS' : 'macOS'} ${country === 'cn' ? '更新' : 'Update'} `;
 
     const item = {};
     $('.whats-new').each(function() {
         const version = $('.whats-new__latest__version')
             .text()
             .split(' ')[1];
-        item.title = titleTags.text() + version;
-        item.description = $('.whats-new__content .we-truncate').text();
+        item.title = `${titleTags.text()} ${version}`;
+        item.description = $('.whats-new__content .we-truncate').html();
         item.link = url;
         item.guid = id + version;
     });
 
     ctx.state.data = {
-        title: 'App Store 有 App 更新',
+        title,
         link: url,
         item: [item],
     };
diff --git a/yarn.lock b/yarn.lock
index 73a285c0cd..f481427fee 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2118,6 +2118,10 @@ csso@~2.3.1:
     clap "^1.0.9"
     source-map "^0.5.3"
 
+currency-symbol-map@^4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/currency-symbol-map/-/currency-symbol-map-4.0.4.tgz#3cfba625974dd3f86822d327ecbd10248695e95e"
+
 currently-unhandled@^0.4.1:
   version "0.4.1"
   resolved "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz#988df33feab191ef799a61369dd76c17adf957ea"