Comparison

Image Junky vs SlowLightMeter

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

Head to head
About

Image Junky

This app transforms your iPhone into a parallax-corrected viewfinder for any camera. It calculates image adjustments based on lens offsets and provides LiDAR distance measurement for accurate focusing. It also functions as a customizable director's viewfinder with custom camera and lens creation.

Highlights
  • Parallax corrected viewfinder
  • LiDAR distance measurement
  • Customizable director's viewfinder
  • Create custom cameras and lenses
  • Instant opening and easy control
  • Works on iPad
Read full description

Image Junky transforms your camera-mounted iPhone into a parallax corrected viewfinder for any camera or format. Mount your iPhone on your main camera and use it as a live view finder! Enter the offset distances of the iPhone lens from your main camera lens and the app does the math, adjusting the image to keep your compositions accurate. You also get tap to measure LiDar distance information for easy focusing. There are no other apps that have these features. Check out the instruction page for more information on how to mount the iPhone and measure the offsets. Create your own mount or reach out to imagejunkyinfo@gmail.com to buy custom iPhone to camera flash shoe camera mounts. Image Junky also works as a customizable director's viewfinder that isn't slowed down by unnecessary menus and databases of cameras and lenses we don't need. Create and name your custom cameras by entering their sensor or film back dimensions then enter your custom lens focal lengths and you're ready to go. Access any of your custom cameras or lens sets with one tap or use the one tap for "zoom" mode for the ultimate framing flexibility. Image Junky opens instantly, is easy to control, and is ready for to show you the shot right now! Works on iPads as well.

About

SlowLightMeter

This app provides a simple and accurate light meter for film photographers. It continuously measures light with minimal interaction and includes an ISO lock to prevent accidental changes. EV values are a core feature for ease of use.

Highlights
  • Reflective and incident light metering
  • Continuous light measurement
  • ISO lock
  • EV value display
  • Simple interface
Features
Read full description

As a film photographer, I wanted an accurate yet simple reflective and incident light meter. After trying several, I decided to build my own. This light meter continuously measures light, so it requires minimal interaction during a shoot. To avoid accidentally changing film ISO, I added an ISO lock. And since I shoot often with my Hasselblad, I made EV values a core feature of the app.

Screenshots

Image Junky1 screens
SlowLightMeter2 screens

Verdict

The call

The clearest difference is price: SlowLightMeter at Free against Image Junky's $7.99. SlowLightMeter also leads on update cadence (every 4 days vs fortnightly). On rating, review sentiment, ratings volume and ads 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

SlowLightMeter is free to download; Image Junky costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Image Junky against 5.0 for SlowLightMeter. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Image Junky ships an update fortnightly, SlowLightMeter every 4 days. Both last shipped on September 18, 2026.

Scorecard3 real differences · 7 level
Image Junky versus SlowLightMeter: the parameters behind the verdict, then further details
ParameterImage JunkySlowLightMeter
Price$7.99Free — better
Rating5.0 (4 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings4 — better2
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size2 MB1 MB
Age rating4+4+
DeveloperVendler IndustriesAri Jaaksi

Customer experience

Image Junky

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SlowLightMeter

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Image Junky

No in-app purchases

None

SlowLightMeter

No in-app purchases

Questions

Is Image Junky free?
Image Junky costs $7.99, with no in-app purchases.
Is SlowLightMeter free?
SlowLightMeter is free to download, with no in-app purchases.
Which has better reviews, Image Junky or SlowLightMeter?
Image Junky and SlowLightMeter are both rated 5.0 out of 5 on the App Store, from 4 and 2 ratings respectively.
Do Image Junky or SlowLightMeter have ads?
Neither Image Junky nor SlowLightMeter shows ads.
Which is updated more often, Image Junky or SlowLightMeter?
Image Junky ships an update fortnightly, and SlowLightMeter every 4 days. Most recently, Image Junky was updated on September 18, 2026 and SlowLightMeter on September 18, 2026.

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