Comparison

Epson iProjection vs 立極尺

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

Head to head
About

Epson iProjection

Wirelessly project your iPhone, iPad, or iPod touch screen, documents, and photos to a compatible Epson projector. Easily connect by scanning a QR code, and even annotate projected images. Supports up to 50 devices and simultaneous screen displays.

Highlights
  • Mirror device screen and audio
  • Project photos and documents
  • Real-time camera projection
  • QR code projector connection
  • Multi-device connectivity
  • Image annotation tool
  • Projector remote control
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Epson iProjection is a wireless projection app for iPhone®, iPad®, or iPod® touch. This app makes it easy to mirror your device's screen, and project documents and photos wirelessly to a supported Epson projector. [Key Features] 1. Mirror your device’s screen and output your device’s audio from the projector. 2. Project your photos in the "Photos" app, project documents loaded in this app, and project in real-time video from your device's camera. 3. Easily connect your device by scanning a projected QR code. 4. Connect up to 50 devices to the projector, display up to four screens simultaneously, and share your projected image with the other connected devices. 5. Annotate projected images with a pen tool and save the edited images on your device. 6. Control the projector like a remote control. [Notes] • For supported projectors, visit https://support.epson.net/projector_appinfo/iprojection/en/. You can also check "Supported Projectors" in the app's support menu. • While mirroring your device’s screen, video and audio may be delayed depending on the device and network specifications. Only unprotected content can be projected. • Use the mirroring feature to project videos in the "Photos" app. [About Projecting Documents] • The following file types are supported when projecting using "Documents". - Microsoft® Word - Microsoft® Excel - Microsoft® PowerPoint - Keynote - PDF - JPG - PNG - The file types mentioned above are also supported when stored in cloud file services • Depending on the document, the projected image may differ from the image on the computer or at the time of creation, for example, some characters may not be projected correctly. If this occurs, use the mirroring feature ("Mirror device screen") instead. • Animations and screen transition effects, videos, and audio are not played. Use the mirroring feature to play them. • We recommend testing the projection in advance when using this app for presentations. [Using the App] Make sure that the network settings for the projector have been completed. 1. Switch the input source on the projector to "LAN". Network information is displayed. 2. Connect to the same network as the projector from "Settings" > "Wi-Fi" on your iPhone/iPad/iPod touch. 3. Start Epson iProjection and connect to the projector. 4. Select and project from "Mirror device screen", "Photos", "Documents", "Web Page", or "Camera". [App permissions] The app requires the following permissions for specific features. 【Required】 Local Network - Search for and connect to the projector. 【Optional】] Photo - Project selected photos from the device to the projector. * You can use the app without granting the optional permissions, but some features may not work. All images are examples and may differ from the actual screens.

About

立極尺

Features
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* 立極尺功能簡介 * 立極尺縮放、旋轉 - 使用手勢放大、縮小及旋轉手勢,便可將立極尺放大、縮小及旋轉。 * 導入平面圖 -於立極尺中心,按下半秒,選擇菜單便會彈出。 * 更改立極尺顏色 - 在需要修改顏色的地方,按下半秒,顏色選擇菜單便會彈出,此時,便可選擇顏色。 * 指南針功能 * 聯絡素森: 電郵:susanneyung@gmail.com

Screenshots

Epson iProjection4 screens
立極尺4 screens

Verdict

The call

The clearest difference is price: Epson iProjection at Free against 立極尺's $39.99. Epson iProjection also leads on review sentiment (20% vs 0%). 立極尺's advantage is iOS requirement (13.0 vs 15.0). On update cadence, 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

Epson iProjection is free to download; 立極尺 costs $39.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Epson iProjection ships an update every 6 months, 立極尺 every 9 months. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Epson iProjection versus 立極尺: the parameters behind the verdict, then further details
ParameterEpson iProjection立極尺
PriceFree — better$39.99
Rating4.3 (3.6K ratings) — better—
Positive reviews19.8% of reviews — better0.0% of reviews
Number of ratings3.6K — better—
Update frequencyEvery 6 months — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size27 MB29 MB
Age rating4+4+
DeveloperSeiko Epson CorporationSuk Shan Yung

Customer experience

Epson iProjection

All ratings3,395 ratings
Positive82.4%
Neutral3.6%
Negative14.0%
Written reviews293 reviews
Positive19.8%
Neutral8.2%
Negative72.0%

立極尺

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Epson iProjection

Reported bugs

4 issues
  • App crashes frequently
  • Fails to detect projector
  • Issues with PowerPoint/Keynote presentations
  • Formatting problems with shared content

Requested features

5 requests
  • Add screen mirroring capability
  • Support for more file formats
  • Improve video streaming
  • Integrate with cloud storage services
  • Enhance presentation features

立極尺

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Epson iProjection

No in-app purchases

None

立極尺

No in-app purchases

Questions

Is Epson iProjection free?
Epson iProjection is free to download, with no in-app purchases.
Is 立極尺 free?
立極尺 costs $39.99, with no in-app purchases.
Do Epson iProjection or 立極尺 have ads?
Neither Epson iProjection nor 立極尺 shows ads.
Which is updated more often, Epson iProjection or 立極尺?
Epson iProjection ships an update every 6 months, and 立極尺 every 9 months. Most recently, Epson iProjection was updated on October 31, 2026 and 立極尺 on October 24, 2026.

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