Duochang vs 知数乐园
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Duochang
This app simplifies singing by allowing easy searching of songs by artist, title, or playlist. Users can control playback, volume, and song selection directly from their device, making the karaoke experience more convenient.
- Search by singer, song title, or playlist
- Convenient song selection
- Playback controls (pause, play, skip)
- Volume adjustment
- Simple operation
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Duochang APP,让唱歌变成简单的事情。可以通过歌星、歌名、歌单进行搜索,唱您想唱的歌,点歌超方便。还可以通过APP进行暂停、播放、切歌、调节音量等控制,操作很简单,唱歌更轻松。
知数乐园
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1.契合3-7岁儿童的认知习惯与发展规律,将数字认知与互动绘本相结合,好学又好玩。 2.包含运算、识数、几何、集合、分类、逻辑等板块,搭配有趣的情景互动,不同难度的分级挑战,多种自然界主题持续更新,海量内容,轻松伴学。 3.边玩边学,手脑并用,高效学习。多维培养小朋友的数学思维、记忆、想象力及审美能力。 应用程序订阅: 您可以订阅以获得访问《知数乐园》的所有内容的权限 一旦购买确认后,款项将直接从iTunes账号扣除 订阅会每周自动以与之前的相同价格续期,除非在当前订阅期结束前至少提前24小时关闭自动续期 当前订阅期结束前的24小时内会根据您选择的每周计划从账号扣除续期费用 购买后,用户可在iCloud账号设置中管理订阅和关闭自动续期 在有效订阅期间,无法取消当前订阅 您可以透过iCloud账户的订阅设置在免费试用期间来取消订阅,请务必在订阅结束前24小时完成,以避免被收取费用。更多讯息请至:http://support.apple.com/kb/ht4098 您可以通过iCloud账号设置来关闭自动续期。无认如何您无法在有效订阅期间取消目前订阅。 服务条款和隐私政策请至以下连结: 隐私政策: https://satinno.com/app_privacy_policy.html 服务条款: https://satinno.com/tos.html 价格等于《Apple的App Store定价表》规定的以美元计价的同阶订阅价格。
Screenshots
Verdict
The clearest difference is price: Duochang at Free against 知数乐园's $0.99. Duochang also leads on in-app purchases (none vs 2) and ads (none vs shown). 知数乐园's advantage is update cadence (every 5 days vs every 3 months). On device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Duochang is free to download; 知数乐园 costs $0.99 up front. 知数乐园 sells 2 in-app purchases, starting at $0.99 per 7 days. Duochang asks for nothing beyond the download.
Duochang ships an update every 3 months, 知数乐园 every 5 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | Duochang | 知数乐园 |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 2.3 (6 ratings) — better | — |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 3 months | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 50 MB | 401 MB |
| Age rating | 4+ | 4+ |
| Developer | Fujian Star-net eVideo Information Systems Co.,Ltd. | Yang Zhou |
In-app purchases
Duochang
No in-app purchases
知数乐园
- 知数乐园每周计划$0.997 Days
- 知数乐园每年计划$34.991 Year









