Comparison

ZETSU by Orion vs Castly+

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

Head to head
About

ZETSU by Orion

This modular application enables developers to create and share content modules that can display images and text. It offers a customizable reading experience with features like favorites, categorization, and dynamic UI adjustments.

Highlights
  • Custom Text Reader
  • Custom Image Viewer
  • Favorites management
  • Content categorization
  • Downloadable modules
  • Dynamic UI
  • Customizable colors
  • Light/Night mode
Features
Read full description

ZETSU by Orion ZETSU is a Modular app that allow developers to create and share modules, this modules can output Images & Text Content. Fetatures: Custom Text Reader. Custom Image Viewer / Reader. Favorites. Categorizer. Downloads. Dynamic UI. Customizable Colors. Light / Night Mode. And much more! - ZETSU neither us distribute any modules. - All the modules are added by the user, We are not responsible neither liable for the contents / media displayed by the modules imported by the user. - The user brings their own content (modules) to ZETSU, ZETSU just executes and reproduce the media imported by the user like any image, text viewer / reader. You can read our legal disclaimer & terms and conditions at https://zetsu.pw/

About

Castly+

This utility app offers a suite of tools for media manipulation and content capture. Extract audio from videos, capture video covers, stitch photos, create emojis, and take long screenshots of web pages. It also supports casting playback addresses to big screen devices.

Highlights
  • Screen casting via AirPlay or Chromecast
  • Extract audio from videos
  • Capture video cover images
  • Stitch multiple photos together
  • Generate custom emojis
  • Take long web page screenshots
Read full description

Get the official Castly+ app on iPhone and iPad. A life tool that not only supports casting - Screencast any playback address, Extract audio from video, Gets video cover, Stitch pictures according to your ideas, Make emoticons according to your ideas. Subscription - Unlimited Cast      - Unlock All Tools      - Never be interrupted by ads      - Stay tuned for more linkage benefits Screencast The screen casting function supports casting a broadcast address to your big screen device on the same Wi-Fi network through airplay mode or Chromecast-compatible devices. Local network access is used only to discover nearby cast-ready devices on your home network. Audio extractor Now you can use the audio extraction function to get the audio you want from your authorized album video. Cover extractor When you watch videos on the Internet, there are always some soul-stirring covers that you want to get but can't get. Now you have a way, that is to use this video cover acquisition module. Long screenshot of the web page When you browse a news or knowledge page, you need to save the information of the entire page, but want to take a screenshot of the entire page at one time, the web page long screenshot function will be your best choice.  Photo stitching When you want to share multiple photos of your life at once on social media, the picture stitching function will help you. Emoji generation Give full play to your imagination and create some funny expressions for your friends. Terms of use:https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://sites.google.com/view/castly2/privacypolicy

Screenshots

ZETSU by Orion4 screens
Castly+4 screens

Verdict

The call

The clearest difference is rating: Castly+ at 4.7 against ZETSU by Orion's 3.8. Castly+ also leads on update cadence (every 2 months vs every 5 months) and ratings volume (14K vs 1.2K). ZETSU by Orion's advantage is review sentiment (60% vs 35%) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model 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

Both are free to download. ZETSU by Orion sells 2 in-app purchases, starting at $2.49 per month and Castly+ sells 10 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Castly+ holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Castly+ has 14K ratings behind it against 1.2K, so its average is the more settled of the two. Written reviews complicate that: 60% of ZETSU by Orion's written reviews are positive against 35% of Castly+'s, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ZETSU by Orion ships an update every 5 months, Castly+ every 2 months. The most recent releases landed on November 3, 2026 and November 13, 2026 respectively.

Scorecard6 real differences · 5 level
ZETSU by Orion versus Castly+: the parameters behind the verdict, then further details
ParameterZETSU by OrionCastly+
PriceFreeFree
Rating3.8 (1.2K ratings)4.7 (14K ratings) — better
Positive reviews59.7% of reviews — better35.3% of reviews
Number of ratings1.2K14K — better
Update frequencyEvery 5 monthsEvery 2 months — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#139 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size97 MB30 MB
Age rating17+4+
DeveloperDCODE, SLUHONGKONG BLUE WHALE AND OCEAN TECHNOLOGY CO., LIMITED

Customer experience

ZETSU by Orion

All ratings1,161 ratings
Positive69.0%
Neutral9.8%
Negative21.2%
Written reviews345 reviews
Positive59.7%
Neutral18.0%
Negative22.3%

Castly+

All ratings13,573 ratings
Positive93.4%
Neutral2.2%
Negative4.4%
Written reviews139 reviews
Positive35.3%
Neutral10.8%
Negative54.0%

User reviews

ZETSU by Orion

From 1.2K App Store ratings

What we love

  • 👍 Great app for reading manga
  • 🚀 Vast selection of manga and manhwa
  • 💎 Premium subscription is a good deal
  • 🔍 Useful module system for sourcing content

Room to improve

  • 🐛 Modules not working or unreliable
  • 🔍 Difficulty finding new manga to read
  • 📢 Too many ads, especially between chapters
  • 🔧 Frequent crashes and loading issues

Castly+

From 14K App Store ratings

What we love

  • 🚀 Streams well
  • 💡 Good content selection
  • 👍 Works flawless
  • 👍 Easy to use
  • 👍 Good app

Room to improve

  • 🐛 Casting issues
  • 🐛 Crashes/freezes
  • 🐛 Subscription problems
  • 🐛 Ads even with subscription
  • 🐛 Not working as expected

Bugs and requests

ZETSU by Orion

Reported bugs

4 issues
  • Losing saved manga/history after updates
  • Download feature not working reliably
  • Modules disappearing or not loading
  • Chapters not loading or displaying correctly

Requested features

4 requests
  • Add a 'no ads' purchase option
  • Implement a 'recently updated' section
  • Allow right-to-left reading orientation
  • Bring back the KETSU app for anime

Castly+

Reported bugs

4 issues
  • Casting stops midway through content
  • App closes unexpectedly
  • Subscription not working as intended
  • Ads still present despite paid subscription

Requested features

4 requests
  • Fix casting issues
  • Improve stability and reliability
  • Ensure subscription benefits work as advertised
  • Provide better customer support

In-app purchases

2 purchases

ZETSU by Orion

Subscriptions2
  • ZETSU Premium!$2.491 Month
  • KETSU Premium!$23.991 Year
10 purchases

Castly+

Subscriptions10
  • Weekly tool subscription$1.997 Days
  • Castly Premium-Weekly$2.997 Days
  • Weekly for family$3.997 Days
Show 7 more
  • Free trial tool monthly1 Month trial$4.991 Month
  • Remove interstitial ad monthly1 Month trial$4.991 Month
  • Monthly tool subscription1 Month trial$4.991 Month
  • Castly Premium-Monthly1 Month trial$6.991 Month
  • Monthly for family1 Month trial$9.991 Month
  • Annually tool subscription$29.991 Year
  • Castly Premium-Yearly$39.991 Year

Questions

Is ZETSU by Orion free?
ZETSU by Orion is free to download, with in-app purchases available.
Is Castly+ free?
Castly+ is free to download, with in-app purchases available.
Which has better reviews, ZETSU by Orion or Castly+?
Castly+ is rated higher. ZETSU by Orion averages 3.8 out of 5 from 1.2K ratings, while Castly+ averages 4.7 from 14K ratings.
Do ZETSU by Orion or Castly+ have ads?
Both ZETSU by Orion and Castly+ show ads.
Which is updated more often, ZETSU by Orion or Castly+?
ZETSU by Orion ships an update every 5 months, and Castly+ every 2 months. Most recently, ZETSU by Orion was updated on November 3, 2026 and Castly+ on November 13, 2026.

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