# engineer toolbox

> engineer toolbox (iPhone/iPad app by 程彬 吕.)

- Source: https://appshunter.io/ios/app/engineer-toolbox/id6759856213 (this page in markdown: same URL + `.md`)
- Developer: [程彬 吕](https://appshunter.io/developer/1879737471)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 35 MB
- Languages: American English
- Released: 2026-03-28
- Data updated: 2026-06-04
- User reviews in markdown: https://appshunter.io/ios/app/engineer-toolbox/id6759856213/reviews.md

## What is engineer toolbox?

Engineer Toolbox 是一款面向电子与硬件工程师的实用计算工具，提供常见电子电路参数计算、单位换算和目标反推功能，帮助用户更高效地完成设计、分析与验证工作。
应用内包含多种常用计算功能，包括：
LDO 分压电阻计算
PCB 参数计算
热阻计算
电阻 / 电容 / 电感换算
无源滤波器计算
欧姆定律计算
变压器计算
基本运放放大电路计算等
部分功能需通过自动续订订阅使用。应用提供包月订阅和包年订阅，具体价格以应用内展示为准。订阅将在每个订阅周期结束时自动续订，除非用户至少在当前周期结束前 24 小时取消订阅。用户可在购买后前往 Apple ID 账户设置中管理或取消订阅。
服务条款（EULA）:
https://www.apple.com/legal/macapps/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 包月价格 | $0.99 | per month |
| 包年价格 | $5.99 | per year |



## Version history (last 1 release)

### 1.0 — 2026-03-28

No release notes.

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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 2026-06-04.*