Calculator with History

What it does

Calculator with History keeps every formula and result visible — no more wondering "how did I get that number?" ✅ No install required — works in any browser ✅ PWA support — add to home screen like a native app ✅ Works offline once loaded ✅ Tap any past result to reuse it ✅ Stores up to 100 calculations ✅ Optimized for iPhone & Android Perfect for students doing homework, or anyone who needs to trace back their calculations.

• IM
  I made a web-based notepad with a built in unit calculator2022 · numpad.io · ▲488

  Hi HN It also supports percentages, dates and variables. I've been working on this alone for a few years now, so would love to get some feedback.

• IG
  I Got Tired of Calculator Sites, So I Built My Own2025 · ▲58

  I’ve always found that online calculators tend to have bad UIs, especially on mobile. Most of the calculator websites I’ve come across use outdated and inconvenient ways of inputting data, or they format the results in confusing ways. I’ve noticed that fraction calculators (especially mixed fractions) are terrible to use, even on desktop. I haven’t built one of those yet, but it’s something I’m planning to tackle soon. This is a project I’ve always wanted to work on, but I’m relatively new to this space. So far, I’ve created a collection of simple calculators focused on math and finance. I’d…

• 
  Smartz Calculator with HistoryFeb 2026 · ▲1

  Calculator for merchants. Track history & generate receipts.

• 
  WorldculatorJun 2026 · worldculator.com · ▲6

  250+ free calculators for finance, health, math & more

• 
  CalcHiveJun 2026 · calchive.site · ▲3

  Free, instant calculators for everyday problems.

• 
  MoneyCrunchLabJul 2026 · moneycrunchlab.com · ▲6

  25 free calculators - your numbers never leave your browser

• 
  Dograh▲592

  The open source VAPI alternative

  Dev tools · 25d ago · dograh.com

• 
  Meridian▲530

  Don't let your work go unnoticed. Get promoted!

  Dev tools · 20d ago · meridiona.com

• 
  x1▲516

  Lovable for iPhone apps go from idea to App Store

  Dev tools · 11d ago · x1.new

• 
  Computable GPU Index (CGI)▲423

  The first open-source price index for GPU compute

  Dev tools · 10d ago · getcomputable.com

• 
  Open-Source eInk Bike Computer▲406

  OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.

  Dev tools · 2d ago · opentrailpaper.com

• 
  The GTM Co-Founder▲402

  Open-source GTM skills for technical founders

  Dev tools · 29d ago · gtmcofounder.com

• 
  Brew ▲905

  Like Claude design for email marketing

  AI · May 2026 · brew.new

• 
  Kilo Code for VS Code▲897

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

• 
  StoreClaw▲805

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

• 
  PollyReach▲796

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

• NW
  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

• FM
  Files.md – Open-source alternative to Obsidian▲730

  Dev tools · May 2026 · github.com