Comparison

NDCalc2 vs ND+Timer

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

Head to head
About

NDCalc2

Calculate correct exposure times when using ND filters for long exposures. Easily manage your filter collection, add custom filters, and switch between single and multi-select modes for stacking.

Highlights
  • Calculate exposure time with ND filters
  • Supports iPhone 5/s/c screens
  • Multi-Select Mode for filter stacking
  • Add custom ND filters
  • Delete and reorder filters
  • Countdown timer for long exposures
Features
Read full description

Screenshots are german but it's translated to english too. This is a completely rewritten Version of NDCalc - now called NDCalc2. It's all new with these great features: - build for iOS7 - supports the 4" Screens of iPhone5/s/c - supports retina - Much more comfortable selection of shutter speed and NDFilter (no wheel control) - Multi-Select! Finally! You can switch to Multi-Select-Mode with a single tap in the toolbar if you are a ND-Filter-Stacker like myself :) Just activate Multi-Select-Mode and tap on any Filter you have stacked to the lens for really long exposures. - Add your own Filters! Finally! You own a filter which is not listed in the default list? Just add it by f-stops, ND-Value or Factor. - Delete Filters. Just delete all filters you don't own and make selecting filters much more convenient - Reorder Filter. Order the Filter-List as you like it. Bring up the most used filters to the top of the list. The core function is still the same as NDCalc: You know the time without the filter -how long do you need to exp. WITH filter? Sounds easy but tell me quickly how long to exp. with an ND 1.8 if the time without filter is 1/320? Now you can! Set Filter and exp. time without the filter and you can see the correct time. In the example above 1/5 Even easier it shows you 5 because this is what you can set on a dSLR. Smaller letters showing you the actual time. For 12500'' it shows, that these are 3h, 28m and 20s. For times of 4+ seconds you get a countdown button to easily stop longer exposures manually with a remote shutter release with alarm and vibration (if supported).

About

ND+Timer

This app helps photographers determine correct exposure times for long exposure shots using ND filters. It includes a timer to capture the perfect moment and offers pro features through in-app purchases for enhanced functionality.

Highlights
  • Exposure time calculation with ND filters
  • Integrated timer for capturing moments
  • Notifications while device is locked
  • Dark mode (Pro feature)
  • Lock screen widget with running timer (Pro feature)
  • Dynamic Island support (Pro feature)
  • Automatic exposure computation for multiple filters (Pro feature)
Features
Read full description

You are on a trip and would like to take a photo of a waterfall? Maybe You would like to take a long time exposure. ND+Timer gives you all the required capabilities to do filter photography. With ND+Timer you can always determine the correct exposure time for your photo. You can use the included timer feature to avoid missing the perfect moment. ND+Timer provides a lot of features: - Intuitive and clean app for photographers - Simple determination of exposure times with ND filters - Timer feature for taking photos - Notifications while device is locked ND+Timer is a freetime app project. To avoid annoying ads the app has some features available through in app purchases. Have understanding for this. Pro features (in app purchase): - Dark mode for the night - Widget with running timer on the lock screen - Support for the Dynamic Island - Hide unnecessary filters for clarity - Compute the exposure time automatically for multiple filters

Screenshots

NDCalc24 screens
ND+Timer4 screens

Verdict

The call

The clearest difference is review sentiment: ND+Timer at 60% against NDCalc2's 0%. ND+Timer also leads on price (Free vs $0.99) and update cadence (every 2 months vs every 10 months). NDCalc2's advantage is in-app purchases (none vs 1) and iOS requirement (7.0 vs 15.6). On ads 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

ND+Timer is free to download; NDCalc2 costs $0.99 up front. ND+Timer sells 1 one-off in-app purchase. NDCalc2 asks for nothing beyond the download.

UpkeepUpdate frequency

NDCalc2 ships an update every 10 months, ND+Timer every 2 months. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

Scorecard6 real differences · 4 level
NDCalc2 versus ND+Timer: the parameters behind the verdict, then further details
ParameterNDCalc2ND+Timer
Price$0.99Free — better
Rating1.5 (2 ratings) — better—
Positive reviews0.0% of reviews60.0% of reviews — better
Number of ratings2 — better—
Update frequencyEvery 10 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better15.6
Further details — not scored
Size20 MB9 MB
Age rating4+4+
DeveloperBoris NienkeTobias Ullerich

Customer experience

NDCalc2

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

ND+Timer

Written reviews5 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

In-app purchases

None

NDCalc2

No in-app purchases

1 purchases

ND+Timer

One-time1
  • ND+Timer Pro$1.99

Questions

Is NDCalc2 free?
NDCalc2 costs $0.99, with no in-app purchases.
Is ND+Timer free?
ND+Timer is free to download, with in-app purchases available.
Do NDCalc2 or ND+Timer have ads?
Neither NDCalc2 nor ND+Timer shows ads.
Which is updated more often, NDCalc2 or ND+Timer?
NDCalc2 ships an update every 10 months, and ND+Timer every 2 months. Most recently, NDCalc2 was updated on September 21, 2026 and ND+Timer on September 20, 2026.

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