# ND Filter Calc vs Lensly.

The clearest difference is in-app purchases: ND Filter Calc at none against Lensly.'s 2. ND Filter Calc also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Lensly. sells 2 in-app purchases, starting at $14.99 per month. ND Filter Calc asks for nothing beyond the download.

ND Filter Calc ships an update every 6 days, Lensly. weekly. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ND Filter Calc | Lensly. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lensly/id6760372089/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Free | Free |
| Size | 47 MB | 26 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jerry Watson](https://appshunter.io/developer/1647846813) | [Lensly LLC](https://appshunter.io/developer/1884169507) |

## What reviewers say

### ND Filter Calc

[App page](https://appshunter.io/ios/app/nd-filter-calc/id6449380764)

This tool helps photographers calculate neutral density filter effects on their camera's exposure. It includes a countdown timer for long exposures, simplifying the process of achieving desired results.

**Highlights:** Neutral density filter calculation, Exposure compensation, Long exposure timer, Countdown for shutter speeds > 3 seconds, Simple interface

**In-app purchases:** none


### Lensly.

[App page](https://appshunter.io/ios/app/lensly/id6760372089)

Easily find and book local photographers for any occasion, from weddings to portraits. Browse portfolios, compare transparent pricing, and book sessions instantly. Photographers can create profiles, list packages, and manage bookings.

**Highlights:** Browse local photographers and packages, Filter by category, price, distance, and rating, View portfolios and read reviews, Instant booking and in-app contracts, Direct messaging with photographers, Create photographer profiles and packages

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lensly Pro Monthly | $14.99 | per month |
| Lensly Pro Yearly | $119.99 | per year |


## Frequently asked questions

### Is ND Filter Calc free?

ND Filter Calc is free to download, with no in-app purchases.

### Is Lensly. free?

Lensly. is free to download, with in-app purchases available.

### Do ND Filter Calc or Lensly. have ads?

Neither ND Filter Calc nor Lensly. shows ads.

### Which is updated more often, ND Filter Calc or Lensly.?

ND Filter Calc ships an update every 6 days, and Lensly. weekly. Most recently, ND Filter Calc was updated on September 30, 2026 and Lensly. on October 7, 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.*