Comparison

Luminis Light Meter vs SlowLightMeter

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

Head to head
About

Luminis Light Meter

Features
Read full description

Light Meter is an app that helps you calculate the right exposure using your main phone camera. You just need to set the ISO speed of the film you're using and set the desired aperture value and the app will recalculate the shutter speed for you, simple as that. Features: • Calculate exposure with the main camera sensor • Tap the aperture or shutter speed value to lock it and change priority mode • Use the zoom menu or simple pinch to zoom function and use zoomed part as the area metering mode • Use the Snap function to easily set the desired camera parameters • Add and save your entire shooting process to notes quickly • Back up your notes using the backup feature • Use B&W mode to see how your photos will turn out in real time • Use the Film Stock feature to choose the type of film you're shooting with We constantly update the app to provide more features that users are looking for, so expect even more with future updates. Thank you for using the Light Meter app.

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

Luminis Light Meter4 screens
SlowLightMeter2 screens

Verdict

The call

The clearest difference is ads: SlowLightMeter at none against Luminis Light Meter's shown. SlowLightMeter also leads on update cadence (every 4 days vs every 2 weeks). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Luminis Light Meter ships an update every 2 weeks, SlowLightMeter every 4 days. The most recent releases landed on September 14, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Luminis Light Meter versus SlowLightMeter: the parameters behind the verdict, then further details
ParameterLuminis Light MeterSlowLightMeter
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 2 weeksEvery 4 days — better
AdsYesNo — better
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size28 MB1 MB
Age rating9+4+
DeveloperDejan BorasAri Jaaksi

In-app purchases

None

Luminis Light Meter

No in-app purchases

None

SlowLightMeter

No in-app purchases

Questions

Is Luminis Light Meter free?
Luminis Light Meter is free to download, with no in-app purchases.
Is SlowLightMeter free?
SlowLightMeter is free to download, with no in-app purchases.
Do Luminis Light Meter or SlowLightMeter have ads?
Luminis Light Meter shows ads; SlowLightMeter does not.
Which is updated more often, Luminis Light Meter or SlowLightMeter?
Luminis Light Meter ships an update every 2 weeks, and SlowLightMeter every 4 days. Most recently, Luminis Light Meter was updated on September 14, 2026 and SlowLightMeter on September 18, 2026.

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