Mersea メルシー vs Rhythm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mersea メルシー
This app offers personalized advice for creating a body more conducive to pregnancy, based on individual constitution. It provides support for the physical and emotional anxieties of those trying to conceive, with guidance on diet, exercise, sleep, and mental well-being.
- Personalized constitution analysis
- Pregnancy-ready body advice
- Diet, exercise, sleep, and mental care tips
- Basal body temperature tracking
- HealthKit integration for temperature data
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「ひとりじゃないよ、ママになろう。」 Mersea(メルシー)はひとりひとりの体質にあわせた妊娠しやすい体づくりをアドバイス。妊活中の体と心の不安に寄り添うアプリです。 [体質診断] 100個の質問に回答して、あなたの体質をチェック。 数多くの不妊治療に携わってきた薬剤師・国際中医専門員の監修により、妊娠しやすい体づくりのアドバイスをアプリにしました。東洋医学をベースにひとりひとりの体質にあった食事、運動、睡眠、メンタルケアに関する生活習慣を提案します。 東洋医学の不妊治療では、命を育む体の環境をととのえることを大切に考えています。特に、不妊に悩む女性の「冷え」「生理不順」「血行不良」などの改善は、東洋医学の得意分野です。 あなたにあった生活習慣を取り入れて、妊娠しやすい体になりましょう! ※本アプリは、体質の特徴を予測することが目的であり、病気の診断を行うものではありません。病気の兆候がある場合には、病院を受診し、医師の診察を受けましょう。 [基礎体温記録] 毎日の基礎体温を記録してあなたの妊活をサポート。 入力された体温情報はデバイスのヘルスケアに保存されます。 Merseaに関するお問い合わせ、ご質問等はサポートメールアドレスまでお願い致します。
Rhythm
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▱▱▱ You can enjoy running and walking while listening to the endless looping rhythm. ▱▱▱ Equipped with a random rhythm generation function. Automatically generate a new rhythm each time the music loops. You will never get bored. ▱▱▱ You can freely set the tempo of rhythm music according to your own pitch and pace. ▱▱▱ Equipped with metronome function. You can play it to your liking. ▱▱▱ You can choose from 5 types of rhythm sets. Of course, random choice is also possible. ▱▱▱ Loop rhythm also supports manual editing. ▱▱▱ The app will continue to play in the background. ================================= Scientific research has shown that synchronizing human movements with rhythmic music can help athletes perform more efficiently and improve their endurance. ================================= [Slider control] Tempo: Rhythm tempo Metrnome Volume: Metronome volume [Rhythm set] Normal / Analog / Power / Electric / Jazz If all off: Random selection [Manual edit mode] Toggle: Tap to switch on and off On: Mode to turn on by tapping Off: Mode to set off by tapping [Main operation button] Auto: A switch that automatically generates a new rhythm each time you loop Delete: Reset the current rhythm Random: Automatically generate new rhythms Play: Rhythm playback on / off switch
Screenshots
Verdict
The clearest difference is price: Mersea メルシー at Free against Rhythm's $0.99. Mersea メルシー also leads on update cadence (every 6 weeks vs every 20 months) and iOS requirement (11.0 vs 13.0). On ads, 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
Mersea メルシー is free to download; Rhythm costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Mersea メルシー ships an update every 6 weeks, Rhythm every 20 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.
| Parameter | Mersea メルシー | Rhythm |
|---|---|---|
| Price | Free — better | $0.99 |
| Positive reviews | 28.6% of reviews | — |
| Update frequency | Every 6 weeks — better | Every 20 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 89 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | Womens Kampo Inc. | Masanori Katsuta |
In-app purchases
Mersea メルシー
No in-app purchases
Rhythm
No in-app purchases









