Comparison

EyeTesterPro vs i

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

Head to head
About

EyeTesterPro

Perform eye tests using your iPhone or iPad. Features single-device testing with adjustable charts and a two-device 'Connect mode' for remote operation. Ideal for quick vision checks at home.

Highlights
  • Single device eye testing
  • Two-device 'Connect mode' via Bluetooth
  • Adjustable eye chart distance (1-5 meters)
  • Adjustable eye chart size
  • Remote control and display modes
  • Randomized chart angle adjustment
Features
Read full description

This is an eye test application. This application program has the "Connect mode". The mode can communicate two iPhone/iPad with Bluetooth. "Connect mode" can eye test alone by the distance from 1 to 5 meters. Moreover, this application has "Single Mode". This mode can testing with one iPhone/iPad. If this application is used, the eye test of your hope is possible. ※Caution One iPad or more is necessary so that you may testing five meters. [ Single mode ] If you select this mode, be possible to Eye test by single iPhone/iPad. Change the Eye chart by your scroll action. ※Caution It is assumed to be used by multiple people. When eye test, you should take distance from iphone. Horizontal scroll : Change eye chart angle at random Vertical scroll : Change eye chart size [ Connect mode ] If you select this mode, be possible to eye test by two connected iPhone/iPad. Please choose Remote control mode or Display mode with iPhone/iPad respectively. By doing so you can operate iPhone/iPad from a distance. Remote control side : Select distance, make an answer,show result Display side : Show eye test chart -Distance and Eye test chart size- Distance : 1meter, 3meters, (iPad)5meters Chart size : 0.1 - 0.5 (in increments of 0.1) ※Caution!! This application doesn't guarantee about eye test result. If you hope for the accurate diagnosis, you should undergo an examination as an ophthalmologist.

About

i

Capture high-quality microscope images and videos with advanced features. This app allows for scale display, manual adjustments for white balance and exposure, and a unique pass shutter for vibration-free photography. Manage your captured images in a dedicated list and preview on external displays.

Highlights
  • High-quality microscope photography
  • Scale and comment display
  • Electron Microscope and Monochrome modes
  • Pass Shutter for vibration-free capture
  • Manual White Balance and Exposure Correction
  • Dedicated photo list management
  • External display preview
Features
Read full description

"i-NTER SHOT" is an innovative application which supports high quality microscope photographing. In order to attach an iPhone to a microscope, please use the dedicated adaptor “i-NTER LENS”. Here is the information site of “i-NTER LENS” https://www.microscope-net.com/products/smartphone/inter-lens-eng/ [ NEW functions in i-NTER SHOT2 ] - Display Scale and put into a picture - Electron Microscope mode - Monochrome mode - Capture information and comment record / put into a picture - Video mode [ Valuable functions for the microscope imaging ] - Pass Shutter Passing your hand over the front speaker becomes a shutter of a camera without touching the screen. You can take pictures without vibrations. - Magnification - Grid display Three grids are available for an accurate alignment. - Erect and Invert In order to adapt the display and photo to the inverted microscope, elect and invert function is available. - White Balance In addition to Auto White Balance Correction, manual adjustment is available. Two metrics (Color Temperature and Tint) adjustments enable the ideal color representation. - Exposure Correction In addition to Auto Compensation of the brightness, you can modify the brightness manually. This enables you to take a suitable picture of even the dark fluorescent specimen. - Full screen display In order to check the details of the displaying image, you can temporarily disappear whole items on the screen and display the image with full screen. - Dedicated photo list In order to manage the photos taken by this application, a dedicated photo list is available. - Disclosure/Non-Disclosure mode of photos In order not to mix private photos and photos taken by this app, you can hide photos taken by this app on Moment. - External Display Camera preview on an external display by way of AppleTV and HDMI is available. Remarkable full screen display of the camera preview is available with the rotation of the preview on the display in steps of 90 degrees. In order to utilize this application, i-NTER LENS that is a attachment lens between iPhone and Microscope is necessary. https://www.microscope-net.com/products/smartphone/inter-lens-eng/

Screenshots

EyeTesterPro3 screens
i4 screens

Verdict

The call

The clearest difference is price: i at Free against EyeTesterPro's $40.99. i also leads on update cadence (every 2 months vs every 37 months). EyeTesterPro's advantage is iOS requirement (10.0 vs 15.6). On review sentiment, 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

i is free to download; EyeTesterPro costs $40.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

EyeTesterPro ships an update every 37 months, i every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 6 level
EyeTesterPro versus i: the parameters behind the verdict, then further details
ParameterEyeTesterProi
Price$40.99Free — better
Rating—1.0 (4 ratings) — better
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 37 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS10.0 — better15.6
Further details — not scored
Size8 MB146 MB
Age rating4+4+
DeveloperFUSO PRECISIONMicroscope Network Co., Ltd.

Customer experience

EyeTesterPro

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

i

All ratings4 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

EyeTesterPro

No in-app purchases

None

i

No in-app purchases

Questions

Is EyeTesterPro free?
EyeTesterPro costs $40.99, with no in-app purchases.
Is i free?
i is free to download, with no in-app purchases.
Do EyeTesterPro or i have ads?
Neither EyeTesterPro nor i shows ads.
Which is updated more often, EyeTesterPro or i?
EyeTesterPro ships an update every 37 months, and i every 2 months. Most recently, EyeTesterPro was updated on November 1, 2026 and i on November 6, 2026.

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