Comparison

名札交換 vs RenjiCalc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

名札交換

Features
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NFC タグが搭載されたイベントの名札に iPhone を近づけると、簡単に名札の交換ができます。 対応しているイベントの場合、その名札が1枚でも登録されているとイベント情報やタイムテーブル等を確認することもできます。 イベントのタイムテーブルから好みのセッション・トーク等を選び、自分だけのタイムテーブルを作ることもできます。

About

RenjiCalc

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“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

Screenshots

名札交換2 screens
RenjiCalc4 screens

Verdict

The call

The clearest difference is ads: 名札交換 at none against RenjiCalc's shown. RenjiCalc's advantage is iOS requirement (18.0 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

名札交換 ships an update every 3 weeks, RenjiCalc fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level
名札交換 versus RenjiCalc: the parameters behind the verdict, then further details
Parameter名札交換RenjiCalc
PriceFreeFree
Update frequencyEvery 3 weeksFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhoneiPhone
Requires iOS26.018.0 — better
Further details — not scored
Size8 MB11 MB
Age rating4+4+
DeveloperRyoga Tanakaken hasegawa

In-app purchases

None

名札交換

No in-app purchases

None

RenjiCalc

No in-app purchases

Questions

Is 名札交換 free?
名札交換 is free to download, with no in-app purchases.
Is RenjiCalc free?
RenjiCalc is free to download, with no in-app purchases.
Do 名札交換 or RenjiCalc have ads?
RenjiCalc shows ads; 名札交換 does not.
Which is updated more often, 名札交換 or RenjiCalc?
名札交換 ships an update every 3 weeks, and RenjiCalc fortnightly. Most recently, 名札交換 was updated on October 24, 2026 and RenjiCalc on October 25, 2026.

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