Free42

Name: Free42
Rating: 4.74 (3274 reviews)
Author: Thomas Okken

LiveThomas Okken2 apps · 278.6K installsToolsFreecom.thomasokken.free42

HP-42S Simulator: advanced scientific programmable RPN calculator.

Alert me ★ Watch Open in Play ↗

Total installs: 275,912
Installs / day: +54
Rating: 4.7★
Released: 10 Apr 2011
Last update: 4 May 2026
Countries: —

Installs per day

gain of the exact counter

Lifetime avg ≈ 49/day (all installs ÷ days since release)

Daily tracking since 11 Oct 2026 · history grows every day

Install history

exact counter from Google Play

2dAll

Dashed: estimate from the release date (no daily data before 11 Oct 2026) · time axis compressed before that day

Daily tracking since 11 Oct 2026 · history grows every day

Change timeline

Full history

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Data safety

declared by the developer on Google Play

No data shared with third parties
No data collected

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

4 in 2 groups

2 Sensitive0 Notable2 Routine

What this app can do with your phone

Know roughly where you are, using mobile towers and Wi-Fi networks
Know your exact location using GPS, Wi-Fi and mobile networks

LocationSensitive2

Access to where your device is, using GPS or network signals

Know roughly where you are, using mobile towers and Wi-Fi networksapproximate location (network-based) · ACCESS_COARSE_LOCATION
Know your exact location using GPS, Wi-Fi and mobile networksprecise location (GPS and network-based) · ACCESS_FINE_LOCATION

OtherRoutine2

Access to miscellaneous device features that don't fit other categories

Connect to the internet to load content and send datafull network access · INTERNET
Make your phone vibratecontrol vibration · VIBRATE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Download

Full description

Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer. It is a complete rewrite, not using any HP code, and it does not require an HP-42S ROM image. Free42 is an Open Source project. The executables and source code are released under the terms of the GNU General Public License, version 2. All third-party code used in Free42 is either in the public domain, or licensed under terms compatible with GPLv2, or used with the authors' permission.

What's new

Fixed RLN and RRN for negative numbers in BSIGNED mode. More accurate GAMMA for integer arguments.

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