Comparison

JBJ Aquarium vs Md Preview

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • WiFi aquarium control
  • Manage lighting and status
  • Single and multiple device control
  • Manual and automated settings
  • Personalized environment control
  • Real-time operation and preview
Features
Read full description

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;

About

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.

Highlights
  • 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
Features
Read full description

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

JBJ Aquarium4 screens
Md Preview3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
JBJ Aquarium versus Md Preview: the parameters behind the verdict, then further details
ParameterJBJ AquariumMd Preview
PriceFree — better$1.99
Rating1.6 (18 ratings)4.4 (5 ratings) — better
Positive reviews9.1% of reviews71.4% of reviews — better
Number of ratings18 — better5
Update frequencyEvery 16 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS7.0 — better17.0
Further details — not scored
Size29 MB4 MB
Age rating4+4+
DeveloperGuangdong Boyu Group Co.,Ltd.CyberGame Limited

Customer experience

JBJ Aquarium

All ratings17 ratings
Positive11.8%
Neutral5.9%
Negative82.4%
Written reviews11 reviews
Positive9.1%
Neutral9.1%
Negative81.8%

Md Preview

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%
Written reviews7 reviews
Positive71.4%
Neutral28.6%
Negative0.0%

In-app purchases

None

JBJ Aquarium

No in-app purchases

None

Md Preview

No in-app purchases

Questions

Is JBJ Aquarium free?
JBJ Aquarium is free to download, with no in-app purchases.
Is Md Preview free?
Md Preview costs $1.99, with no in-app purchases.
Which has better reviews, JBJ Aquarium or Md Preview?
Md Preview is rated higher. JBJ Aquarium averages 1.6 out of 5 from 18 ratings, while Md Preview averages 4.4 from 5 ratings.
Do JBJ Aquarium or Md Preview have ads?
Neither JBJ Aquarium nor Md Preview shows ads.
Which is updated more often, JBJ Aquarium or Md Preview?
JBJ Aquarium ships an update every 16 months, and Md Preview every 3 days. Most recently, JBJ Aquarium was updated on November 2, 2026 and Md Preview on November 5, 2026.

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