Pocket Optics

Interactive demonstration of geometric (ray) optics.

Alpa-Tek · com.pocketoptics

Not rated yet 50K+ downloads v1.4.2 6.7 MB Android 15+ PEGI 3 · Everyone

Download APK 6.7 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v1.4.2 (14)
Updated: Jul 29, 2026 (2 months ago)
APK size: 6.7 MB
Requires: Android 15+ (API 35)
CPU support: Any (no native code)
Category: Education (app)
Listed since: Apr 19, 2021 (at least)
Permissions: 1
Developer contact: [email protected]

About this APK

Pocket Optics is an app by Alpa-Tek in the Education category, listed since at least April 2021. It has no native code, so it runs on any Android processor.

Since version 1.3.2, the APK grew from 3.3 MB to 6.7 MB and the minimum Android version rose from 4.0.3 to 15. It asks for 1 permission, none of them sensitive. It asks for the same permissions as version 1.4.1.

What's new in v1.4.2

Bug fixes

Description

From the listing uploaded by “appupdater”.

Pocket Optics provides an interactive demonstration of basic principles of geometric (ray) optics. Optics professionals can use it for basic ray and image tracing. Features: 1. Fully interactive touch interface (stylus or compatible mouse is recommended for precision). 2. Supports various screen resolutions - from small phones to large tablets and Android TVs. 3. Point light sources with variable opening angles and optical beams with variable width. The ray density can be adjusted for each source. 4. Adjustable focal lengths for Lenses and Mirrors. 5. Apertures with adjustable openings. 6. Traces images of an Object throughout the optical system. 7. Scrollable screen. 8. Bench configurations can be saved on device for future use. 9. Coordinate grid (can be turned off in Settings). 10. Optic components can be snapped to a smaller grid. 11. Visual Help illustrates all interactive features. 12. Lens focus can be adjusted by dragging focal points or by modifying lens curvature 13. Elements can be grouped in assembly and moved as a unit 14. Spherical and chromatic aberrations can be added to a lens

Version history

5 versions are listed, going back to v1.3.2. Since v1.4.2 it requires Android 15+.

v1.4.2 LATEST Jul 29, 2026 6.7 MB TRUSTED v1.4.1 Sep 7, 2026 6.7 MB TRUSTED v1.4.0 Jun 7, 2025 6.7 MB TRUSTED v1.3.5 Dec 13, 2024 6.6 MB TRUSTED v1.3.2 Aug 27, 2023 3.3 MB TRUSTED

All 5 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jul 29, 2026.
Certificate issued to “Alpa-Tek” This is the certificate of the Google Play version.
Same certificate as the 3 other versions checked

Store checks and file details

Developer signature verified Jul 29, 2026
Validated against Google Play Jul 29, 2026
Signed byCN=Alex Pakhomov, OU=Android Development, O=Alpa-Tek, L=Chagrin Falls, ST=Ohio, C=US
Signing certificate (SHA-1)88:DB:23:D3:24:69:65:F3:BD:F5:B2:7A:94:F7:F5:91:69:9E:86:93
File MD574bd07509cbe25f2358e1054c7e59efe
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 (3 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (1)

Pocket Optics requests 1 permission, none of them sensitive.

Internal broadcast protection (app-defined) com.pocketoptics.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Required hardware & features

Basic touch input android.hardware.faketouch
Landscape screen android.hardware.screen.landscape

Pocket Optics APK: questions and answers

Is there a version of Pocket Optics for older Android phones?

The current version needs Android 15 or later. Version 1.4.1 is the newest listed build that installs on Android 14 and later. Get version 1.4.1 · 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 Pocket Optics 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 3 other versions checked. After downloading, check that the file's MD5 is 74bd07509cbe25f2358e1054c7e59efe.