# Silverlog Scan vs ZoneCalc

The clearest difference is update cadence: Silverlog Scan at every 4 days against ZoneCalc's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Silverlog Scan sells 5 one-off in-app purchases and ZoneCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Silverlog Scan ships an update every 4 days, ZoneCalc every 3 weeks. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Silverlog Scan | ZoneCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 40 MB | 3 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Simon Westgate](https://appshunter.io/developer/1856537803) | [Juergen Suk](https://appshunter.io/developer/6772102748) |

## What reviewers say

### Silverlog Scan

[App page](https://appshunter.io/ios/app/silverlog-scan/id6759198163)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nice One | $0.99 | one-time |
| Legend | $2.99 | one-time |
| Absolute Hero | $4.99 | one-time |
| Guardian Angel | $9.99 | one-time |
| Actual Saint | $29.99 | one-time |


### ZoneCalc

[App page](https://appshunter.io/ios/app/zonecalc-zone-system-meter/id6772102746)

This app assists photographers in precisely calculating exposure and tonal placement using Ansel Adams' Zone System. It offers features for metering, reciprocity correction, and development adjustments, with options for multi-point measurements and data export.

**Highlights:** Zone System exposure calculation, Multi-point metering, Reciprocity correction, Development adjustment recommendations, Film-specific development times, Calculation history and export

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZoneCalc Pro | $3.99 | one-time |


## Frequently asked questions

### Is Silverlog Scan free?

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

### Is ZoneCalc free?

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

### Do Silverlog Scan or ZoneCalc have ads?

Neither Silverlog Scan nor ZoneCalc shows ads.

### Which is updated more often, Silverlog Scan or ZoneCalc?

Silverlog Scan ships an update every 4 days, and ZoneCalc every 3 weeks. Most recently, Silverlog Scan was updated on October 5, 2026 and ZoneCalc on October 12, 2026.

---

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