Data Rhythm vs ieRcalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Data Rhythm
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Visualize Your Life Rhythm with Daily Data "DataRhythm" is an app that rhythmically records your daily health and lifestyle data to help you optimize your lifestyle. Do you have these concerns? Despite exercising regularly, your weight keeps going up… You’re training hard, but your performance remains inconsistent during practice or important events… You’re increasing your client visits in sales activities, yet the results are not showing… In such cases, recording your daily data with this app can reveal patterns and pinpoint causes. App Features Record various data points in one place, such as weight, steps, and visit counts Simple, rhythmic input makes daily tracking easy Visualize data trends through graphs Support rhythmical decision-making based on health and performance data By keeping track of "data" aligned with your daily life rhythm, you might uncover unexpected insights for improvement. Start using DataRhythm to bring rhythm to your life and enjoy a fulfilling daily routine! We welcome your feedback and suggestions!
ieRcalc
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ieRcalcは、計算内容を3つのステージに分けて整理できる電卓アプリです。 見積もりや集計のように複数の項目を扱う場面では、通常の電卓だけでは入力内容や合計を確認しづらいことがあります。ieRcalcなら、ステージごとに項目を分けて入力し、合計を見ながら計算を進められます。 仕事での見積もり管理や作業費の集計はもちろん、買い物、旅行費用、割り勘、家計のメモなど、日常の計算にも使いやすい設計です。テンプレート保存や自動保存にも対応しているため、繰り返し使う計算もスムーズに行えます。
Screenshots
Verdict
The clearest difference is ads: ieRcalc at none against Data Rhythm's shown. ieRcalc also leads on update cadence (every 4 days vs every 3 weeks) and device support (3 vs 1). On price, in-app purchases and iOS requirement 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Data Rhythm ships an update every 3 weeks, ieRcalc every 4 days. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.
| Parameter | Data Rhythm | ieRcalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 17 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Masaki Hayashi | REI KAMIKURA |
In-app purchases
Data Rhythm
No in-app purchases
ieRcalc
No in-app purchases









