# Genba Calc — An undoable calculator

> An undoable calculator (iPhone/iPad app by Teppei Yamazaki.)

- Source: https://appshunter.io/ios/app/genba-calc/id6769899115 (this page in markdown: same URL + `.md`)
- Developer: [Teppei Yamazaki](https://appshunter.io/developer/1581267812)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.5 · 75 MB
- Languages: American English, Japanese
- Released: 2026-06-05
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/genba-calc/id6769899115/reviews.md

## What is Genba Calc?

Genba Calc: The Ultimate Fusion of Calculator Speed and Excel Versatility!
Are you still opening up a heavy laptop just to launch Excel for quick calculations on-site? Or perhaps you've found yourself in front of a whiteboard, balancing a laptop in one hand while tapping away at an old-school calculator with the other... Sound familiar?

"Genba Calc" is a revolutionary, next-generation calculation sheet app that perfectly bridges the gap between smartphone agility and spreadsheet-level capability.

Why Choose Genba Calc?
1. Intuitive Four-Function Base—Ready to Use Instantly
The core experience is built around standard arithmetic, meaning anyone can use it straight out of the box with zero learning curve. Yet, look under the hood, and you’ll find advanced features like parentheses prioritization, complex exponentiation, and fully customizable unit settings.

2. Beautiful Link Graphs: Visualize Your Formulas and Values
See exactly how your data and formulas connect through stunning visual graphs. Say goodbye to the classic Excel frustration of "Which cell is this referencing?" and instantly grasp even the most complex calculation structures at a glance.

3. AI-Powered Calculations and Object Counting
Just describe what you want to calculate, and the built-in AI will instantly generate the perfect formula for you. Even better, simply take a photo, and the AI will automatically count objects in the image and link that number directly into your calculation sheet.

4. Sleek Sheet Designs and Instant Sharing
Customize your sheets with flexible color-coding and cell merging. The refined, modern design ensures you can find the exact sheet you need in a split second. Once your sheet is ready, share it instantly with your team via QR code. Set it up once, and never repeat the same calculation twice.

This App Is Perfect For You If:
You’re tired of the hassle of opening Excel while working on-site or on the go.

You find yourself sitting in front of a PC but still using a handheld calculator (and doing double the work).

You constantly multitask between a whiteboard and a laptop.

You want to share complex, error-free calculation formulas with your team effortlessly.

Lightweight yet infinitely powerful.

Unlock the true potential of your smartphone with the ultimate calculation app.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| AI利用50回分のチャージ | $9.99 | one-time |
| プロ機能の開放 | $3.99 | one-time |
| AI利用10回分のチャージ | $1.99 | one-time |



## Version history (last 5 releases)

### 1.1.1 - Flash Mental Math - Abacus Simulator — 2026-08-21

- Flash Mental Math
- Abacus Simulator
- Improved accuracy for AI counting and formula generation
- New menu interface
- Various design improvements and bug fixes

### 1.0.7 new Design — 2026-06-29

new Design

### 1.0.6 — 2026-06-09

new item

### 1.0.3 — 2026-06-09

bugfix and new item

### 1.0.1 — 2026-06-05

No release notes.

## More apps by Teppei Yamazaki

- [testcalc](https://appshunter.io/ios/app/testcalc/id6737729741)
- [はじめのAI](https://appshunter.io/ios/app/ai/id6740161219)
- [aitango](https://appshunter.io/ios/app/aitango/id6742535846)
- [MachoSounds](https://appshunter.io/ios/app/machosounds/id6746427700)
- [NITAMONO-](https://appshunter.io/ios/app/nitamono/id6747037551)
- [autopoet](https://appshunter.io/ios/app/autopoet/id6748313109)

All apps by Teppei Yamazaki: https://appshunter.io/developer/1581267812

## Related topics

[genba calc](https://appshunter.io/ios/topics/genba-calc) · [genba](https://appshunter.io/ios/topics/genba)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*