JBJ Aquarium vs Md Preview
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JBJ Aquarium
This app allows for smart control of aquariums via WiFi, managing lighting, and other functions. It offers single and multiple device control, with manual and automated settings for a personalized aquatic environment.
- WiFi aquarium control
- Manage lighting and status
- Single and multiple device control
- Manual and automated settings
- Personalized environment control
- Real-time operation and preview
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1、这是一款全新的可以实现智能控制的APP,它可以通过WiFi连接来控制水族箱的亮度、水族灯箱状态等等,是控制多个智能设备的掌上管理平台。 2、功能介绍: 单机模式:可实现多台手机对一台设备的操控,方便快捷; 多机模式:可实现大量设备的同时管理,多台手机对多台设备的操控,功能强大; 轻松连接:设备与APP通过WIFI无线连接,一次连接永久使用; 随心控制:一个APP即可随时控制多个智能设备; 手动模式:实时操控,即时改变,人性化操作,简单方便; 自动模式:设定任务,定时运行,个性化设置,轻松掌控; 1, which is a new multi-functional aquarium APP, WIFI control by the aquarium, the fish and aquatic plants can provide natural growth environment; 2, Features: Single mode: Multiple phones can simultaneously control a aquarium, convenient and quick; Multiple modes: up local area network, can achieve more than one phone for multiple aquarium operation and management, diversity management and operations; Easy connection: APP connection with the aquarium, using a permanently connected via WIFI wireless; Xpress: we can according to personal preference, free operation, to achieve the dream aquarium color; Manual mode: real-time operation, real-time changes, user-friendly operation, simple and convenient; Smart Mode: Set task, timed run, personalization, easy to control; Quick Preview: change brightness, at a glance, a line chart shows, clarity;
Md Preview
View your Markdown files with exceptional clarity on iPhone and iPad. Supports all Markdown features, code syntax highlighting, LaTeX math, and Mermaid diagrams. Renders files offline and integrates with other apps.
- Full GFM support (tables, task lists, footnotes)
- Syntax highlighting for 40+ programming languages
- LaTeX math rendering with KaTeX
- Mermaid diagram support
- Offline rendering on-device
- System file handler for .md files
- Dark mode with automatic theme switching
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Md Preview renders your Markdown files with stunning clarity — right on your iPhone or iPad. Open any .md file from ChatGPT, Obsidian, Notion, GitHub, or 100+ other apps. Md Preview instantly shows a beautiful, fully-rendered preview with support for every Markdown feature you need. FEATURES • Full GFM Support — Tables, task lists, footnotes, strikethrough, and autolinks • Syntax Highlighting — 40+ programming languages beautifully colored • LaTeX Math — Inline and display equations powered by KaTeX • Mermaid Diagrams — Flowcharts, sequence diagrams, pie charts, and more • Dark Mode — Automatic theme switching that follows your system setting • 100% Offline — All rendering happens on-device. No data ever leaves your phone • Open From Anywhere — Works as a system file handler for .md files from any app • File History — Quickly reopen recent files with one tap • Share Extension — Receive Markdown files shared from other apps SUPPORTED FORMATS .md, .markdown, .mdown, .mkd, .mkdn, .mdwn, .mdtxt, .mdtext, .mdx, .rmd, .qmd Md Preview is the fastest way to read Markdown on iOS. No editing, no clutter — just a clean, beautiful preview.
Screenshots
Verdict
The clearest difference is review sentiment: Md Preview at 71% against JBJ Aquarium's 9%. Md Preview also leads on rating (4.4 vs 1.6) and update cadence (every 3 days vs every 16 months). JBJ Aquarium's advantage is price (Free vs $1.99) and ratings volume (18 vs 5). On ads, in-app purchases and device support 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
JBJ Aquarium is free to download; Md Preview costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Md Preview holds the better App Store score, 4.4 against 1.6. Both are backed by a comparable volume of ratings — 18 and 5 respectively. Written reviews point the same way: 9% of JBJ Aquarium's written reviews are positive against 71% of Md Preview's.
JBJ Aquarium ships an update every 16 months, Md Preview every 3 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | JBJ Aquarium | Md Preview |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 1.6 (18 ratings) | 4.4 (5 ratings) — better |
| Positive reviews | 9.1% of reviews | 71.4% of reviews — better |
| Number of ratings | 18 — better | 5 |
| Update frequency | Every 16 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 7.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 29 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Guangdong Boyu Group Co.,Ltd. | CyberGame Limited |
Customer experience
JBJ Aquarium
Md Preview
In-app purchases
JBJ Aquarium
No in-app purchases
Md Preview
No in-app purchases









