# ND+Timer vs SS Calculator for ND Filters

The clearest difference is in-app purchases: SS Calculator for ND Filters at none against ND+Timer's 1. ND+Timer's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.2). On price, update cadence and ads there is nothing between them.

Both are free to download. ND+Timer sells 1 one-off in-app purchase. SS Calculator for ND Filters asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ND+Timer | SS Calculator for ND Filters |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 0 MB |
| Requires iOS | **15.6** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tobias Ullerich](https://appshunter.io/developer/1475365559) | [Yukihito Ono](https://appshunter.io/developer/1868176995) |

## What reviewers say

### ND+Timer

[App page](https://appshunter.io/ios/app/nd-plus-timer/id1534477340)

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:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ND+Timer Pro | $1.99 | one-time |


### SS Calculator for ND Filters

[App page](https://appshunter.io/ios/app/ss-calculator-for-nd-filters/id6757667560)

**In-app purchases:** none


## Frequently asked questions

### Is ND+Timer free?

ND+Timer is free to download, with in-app purchases available.

### Is SS Calculator for ND Filters free?

SS Calculator for ND Filters is free to download, with no in-app purchases.

### Do ND+Timer or SS Calculator for ND Filters have ads?

Neither ND+Timer nor SS Calculator for ND Filters shows ads.

### Which is updated more often, ND+Timer or SS Calculator for ND Filters?

ND+Timer ships an update every 2 months, and SS Calculator for ND Filters every 2 months. Most recently, ND+Timer was updated on November 3, 2026 and SS Calculator for ND Filters on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*