Fralculator
The voice and type calculator that shows every step - with a security toolkit inside
FreeOpen SourceOther1 impressionslaunches Oct 301 comment
Comments
>log in to commentI built Fralculator as an offline‑first, step‑by‑step calculator that adds live graphing, unit conversion, voice input and the EHCalc security toolkit. It runs on Windows and Linux and is ready for AI integration. Let me know what you think!
Fralculator is an offline-first desktop calculator for Windows and Linux that shows step-by-step solutions, supports natural-language input, voice, live graphing and includes a security toolkit.
- for
- Students, engineers, security enthusiasts and anyone needing a privacy-focused calculator on desktop
- pricing
- open source
- license
- MIT
- v0.1.0a month ago
Key features
- Step-by-step solutions — Displays every intermediate PEMDAS step using KaTeX rendering.
- Natural-language input — Accepts plain English queries like “what is 15% of 240” without internet.
- Live graphing — Plots functions in real time with Plotly as you type them.
- Voice input — Offline Whisper-tiny model processes spoken math queries locally.
- Unit & currency conversion — Converts across 11 categories and fetches live ECB rates via a free API.
- EHCalc toolkit — Provides subnet calculator, hash generators, encoders, password strength/generator and port lookup.
- History & tags — Persisted local history searchable and taggable, with click-to-reload.
- Explain This — Rule-based plain-English explanations with a future LLM backend slot.
Use cases
- Quickly solve homework problems with full step traces
- Generate secure passwords or hash values while working offline
- Visualize mathematical functions during engineering analysis
- Convert units or currencies without exposing data to the cloud
- Document calculations by exporting styled PNG images
Fralculator vs alternatives
 Fralculator |  imgproxy | .png?width=64) Livecycle |  Pocketenv | .png?width=64) Langfuse | |
|---|---|---|---|---|---|
| Best for | Step-by-step offline calculator with built-in security tools | Self-hosted image processing | Collaborative preview environments | Universal sandbox runtime | LLM observability |
| Pricing | Open source | Free | Free | Free | Subscription |
| DevHunt upvotes | 1 | 95 | 52 | 73 | 89 |
| Launched | Oct 2029 | Feb 2024 | Jan 2023 | Apr 2026 | Jan 2023 |
- Fralculator vs imgproxy: Imgproxy processes images on-self, while Fralculator focuses on math calculations and security tools.
- Fralculator vs Livecycle: Livecycle offers collaborative preview environments, whereas Fralculator is a single-user offline calculator.
- Fralculator vs Pocketenv: Pocketenv provides sandbox runtimes for agents, while Fralculator is a desktop math tool with no sandboxing.
- Fralculator vs Langfuse: Langfuse tracks LLM app observability; Fralculator is a privacy-first calculator with built-in security utilities.
Fralculator FAQ
Does Fralculator require an internet connection?+
All core features run 100 % locally; only the one-time Whisper model download and optional currency-rate API need internet.
What platforms are supported?+
Pre-built installers are available for Windows and Linux; a macOS build is planned.
Is any user data sent to a server?+
No. Math, graphing, history and security tools stay on the device; only currency rates are fetched on demand.
Can I extend the calculator with my own LLM?+
The code includes a backend registry ready for a local LLM; developers can plug in a model via the provided interfaces.
Summarized by DevHunt from github.com · Sep 30, 2026. Details may change; check the official site.
