Comparison

Sabre vs Neutral Density Calculator

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

Head to head
About

Sabre

Control a Wi-Fi enabled motion sensor and camera trigger remotely. Adjust settings like range, trigger mode, and number of shots. Also features Lidar functionality for distance measurement.

Highlights
  • Remote sensor control
  • Adjust trigger modes
  • Set number of shots
  • Cross-beam functionality
  • Bulb mode settings
  • Lidar distance measurement
Features
Read full description

What is Sabre? Sabre is a Wi-Fi enabled, weatherproof, multi-functional motion sensor and camera trigger. Please note: This is for the original BLUE Sabre. This app will not work with the new Sabre II. This app allows you to adjust all the settings for your Cognisys Sabre photography sensor, including: Range, trigger mode, sample rate, cross-beam functionality, bulb mode, number of shots, and much more. You've just finished setting up your Sabre high in a tree to capture your subject and realize you need to adjust the settings -- no worries! Connect to Sabre with your phone using this app and make any changes you need. No need to get back to the sensor for adjustments. It can all be done right on your phone (or tablet). You can also use this app (in conjunction with the Sabre hardware) to measure distance using its advanced Lidar functionality. This app requires the Cognisys Sabre hardware.

About

Neutral Density Calculator

This utility app assists photographers in determining the correct shutter speed when using neutral density filters. Input your filter's stops and base shutter speed to instantly get the adjusted exposure time, with an optional countdown timer for long exposures.

Highlights
  • ND filter stop input
  • Base shutter speed input
  • Calculated shutter speed output
  • Countdown timer for long exposures
  • Screen dimming during timer
  • Sound notification for timer completion
  • Supports up to 20-stop ND filters
Features
Read full description

Neutral Density Calculator for photographers to calculate the shutter speed when adding neutral density filters to your lens. Set the filter you are using and the shutter speed without the filter and the app calculates the new shutter speed with your filter fitted. This is a utility app that helps you determine the correct exposure time/shutter speed when using Neutral Density Filters. Instantly it tells you exactly how long to leave your shutter open, and it even has a built-in timer countdown clock. Features: - User friendly UI - Includes a countdown timer if exposure time is more than 60 seconds (bulb) - Option to dim the screen while countdown - Option to enable disable sound once timer reach - Neutral density or Optical density unit selection - Supports up to 20-stops of ND filter - Base Shutter speed from 1/8000 - 60 sec - Show Fractional transmittance data with selected ND filter Steps: 1 - How many stops your ND filter is (like a 3-stop, 4-stop, 10-stop, etc.) 2 - Base shutter speed - What your current shutter speed is (before you put your ND filter on your lens) 3 - Final time are calculate base on your input, you can press the start button sync with DSLR/DSLM camera shutter at the same time. And the timer will remind you once timer reach to release your DSLR/DSLM camera shutter. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

Screenshots

Sabre4 screens
Neutral Density Calculator4 screens

Verdict

The call

The clearest difference is rating: Sabre at 5.0 against Neutral Density Calculator's 3.4. Sabre also leads on update cadence (every 4 months vs every 48 months). Neutral Density Calculator's advantage is price ($1.99 vs $9.99) and iOS requirement (13 vs 15.6). On ratings volume, 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

Sabre costs $9.99 and Neutral Density Calculator $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sabre holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

UpkeepUpdate frequency

Sabre ships an update every 4 months, Neutral Density Calculator every 48 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
Sabre versus Neutral Density Calculator: the parameters behind the verdict, then further details
ParameterSabreNeutral Density Calculator
Price$9.99$1.99 — better
Rating5.0 (2 ratings) — better3.4 (5 ratings)
Positive reviews—50.0% of reviews
Number of ratings25 — better
Update frequencyEvery 4 months — betterEvery 48 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613 — better
Further details — not scored
Size2 MB1 MB
Age rating4+4+
DeveloperCognisys, Inc.Nitrio

Customer experience

Sabre

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Neutral Density Calculator

All ratings5 ratings
Positive40.0%
Neutral40.0%
Negative20.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Sabre

No in-app purchases

None

Neutral Density Calculator

No in-app purchases

Questions

Is Sabre free?
Sabre costs $9.99, with no in-app purchases.
Is Neutral Density Calculator free?
Neutral Density Calculator costs $1.99, with no in-app purchases.
Which has better reviews, Sabre or Neutral Density Calculator?
Sabre is rated higher. Sabre averages 5.0 out of 5 from 2 ratings, while Neutral Density Calculator averages 3.4 from 5 ratings.
Do Sabre or Neutral Density Calculator have ads?
Neither Sabre nor Neutral Density Calculator shows ads.
Which is updated more often, Sabre or Neutral Density Calculator?
Sabre ships an update every 4 months, and Neutral Density Calculator every 48 months. Most recently, Sabre was updated on November 6, 2026 and Neutral Density Calculator on November 2, 2026.

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