Manual Flash Calculator

A tool for photographers who prefer manually working with flash guide numbers

National Photographic Services · au.com.nationalphoto.android.manualflashcalculator

Not rated yet 10K+ downloads v3.5.0 1.1 MB Android 6.0+ PEGI 3 · Everyone

Download APK 1.1 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v3.5.0 (350)
Updated: Aug 28, 2026 (1 month ago)
APK size: 1.1 MB
Requires: Android 6.0+ (API 23)
CPU support: Any (no native code)
Category: Photography (app)
Listed since: Mar 6, 2021 (at least)
Permissions: 1
Website: nationalphoto.com.au
Developer contact: [email protected]

About this APK

Manual Flash Calculator is an app by National Photographic Services in the Photography category, listed since at least March 2021. It has no native code, so it runs on any Android processor.

Since version 3.4.0, the APK shrank from 1.6 MB to 1.1 MB and the minimum Android version rose from 5.0 to 6.0. It asks for 1 permission, none of them sensitive. It asks for the same permissions as version 3.4.1.

What's new in v3.5.0

Update to support SDK 37

Description

From the listing uploaded by “appupdater”.

Manual Flash Calculator (Free Edition) provides a handy utility for accurately determining flash-subject distance. It's quick and easy to use for tricky lighting situations and backgrounds, where TTL auto-flash can often struggle. This app is ad-free, and requires no special device permissions or network connectivity. Key Features: • Aperture range F/1.2 to F/22 • ISO range ISO50 to ISO6400 • Flash output ratios to 1/256 power • Flash exposure compensation to 5 EV • Zoom support for unlimited guide settings • Power increments in 1/3, 1/2 or Full stops • Macro closeup distances (in and cm) Set the guide number/zoom coverage, power-ratio limit, power adjustment interval, and guide number units for your flash. (You can find this information from the guide number table in your flash user manual). If you own more than one flash unit, please consider supporting this project by upgrading to Manual Flash Calculator Professional. It supports saving an unlimited number of flash configurations. And it costs less than the price of a cup of coffee!

Version history

3 versions are listed, going back to v3.4.0. Since v3.5.0 it requires Android 6.0+.

v3.5.0 LATEST Aug 28, 2026 1.1 MB TRUSTED v3.4.1 Dec 12, 2025 1.6 MB TRUSTED v3.4.0 Jun 27, 2026 1.6 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Aug 28, 2026.
Certificate issued to “National Photographic Services” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Aug 28, 2026
Validated against Google Play Aug 28, 2026
Signed byCN=Greg Perry, OU=Development, O=National Photographic Services, L=Perth, ST=Western Australia, C=AU
Signing certificate (SHA-1)2C:17:3F:0F:1D:F5:E0:A9:2E:90:2F:9F:EF:70:F1:E2:9A:A0:4C:77
File MD52171c9b64cfa323a436ea0617c5b7323
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (1)

Manual Flash Calculator requests 1 permission, none of them sensitive.

Internal broadcast protection (app-defined) au.com.nationalphoto.android.manualflashcalculator.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

Manual Flash Calculator APK: questions and answers

Is there a version of Manual Flash Calculator for older Android phones?

The current version needs Android 6.0 or later. Version 3.4.1 is the newest listed build that installs on Android 5.0 and later. Get version 3.4.1 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Manual Flash Calculator APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 2171c9b64cfa323a436ea0617c5b7323.