# RenjiCalc:Micro Calc&Timer — Optimize time per microwave

> Optimize time per microwave (iPhone/iPad app by ken hasegawa.)

- Source: https://appshunter.io/ios/app/renjicalc/id6758229797 (this page in markdown: same URL + `.md`)
- Developer: [ken hasegawa](https://appshunter.io/developer/1487396483)
- Category: Utilities, Food & Drink
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 11 MB
- Languages: Japanese
- Released: 2026-01-26
- Data updated: 2026-03-11
- User reviews in markdown: https://appshunter.io/ios/app/renjicalc/id6758229797/reviews.md

## What is RenjiCalc?

“500W for 6 minutes… so how long in my 800W microwave?”
Solve that confusion instantly. From conversion to timer start, everything is smooth and effortless. Make your microwave more useful and easier to use.

【Features】
・Easy wattage conversion: Enter the original wattage and heating time, and it instantly calculates the right time for your microwave.
・One-tap timer from history: Select frequently used items from history and start the timer without recalculating.
・Lock screen progress: Supports the latest iOS Live Activities, so you can check remaining time at a glance on the Lock Screen or Dynamic Island, even when your iPhone is locked.
・Multiple microwave presets: Save and switch between different microwaves, such as one at home and one at work.

【Recommended for】
・People who often eat frozen foods or convenience store meals
・People who use high-power microwaves (700W/800W and above)
・Anyone who has ever overheated food by guessing the heating time


## Version history (last 3 releases)

### 1.1.0 — 2026-02-24

What's New in Version 1.1.0

Thank you for using our app! We’ve made some updates to improve your experience.

New Features:
- English Support: The app is now available in English!

Improvements:
- Enhanced the heating time selector for easier use.
- Fixed minor bugs and improved overall stability.

### 1.0.1 — 2026-01-29

v1.0.1の新機能                                                                                               

  いつもご利用ありがとうございます！                                                                                                        
  より使いやすく、快適に！                                                                                             

 新機能                                                                                                            
  • 履歴の一括削除機能を追加                                                                                           
  - 履歴画面から「すべて消す」ボタンで履歴をまとめて削除できます                                                       

 操作性の改善                                                                                                      
  • 画面タップでキーボードを簡単に閉じられるようになりました                                                           
  • 設定画面のタップ操作がしやすくなりました                                                                           
  • タイマー画面の誤操作防止を強化

### 1.0.0 — 2026-01-27

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 2026-03-11.*