Comparison

简研 vs R90 Sleepytime

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

Head to head

睡前睡眠计算&助眠冥想

About

简研

Features

Read full description

简研是面向临床研究从业者（PM、CRA及CRC）的移动化的项目管理产品，以全面提升从业者的工作效率为核心目标，包括全场景的临床研究功能板块及移动端数据采集能力，降低临研数据的采集成本、提高临研数据的采集效率。

About

R90 Sleepytime

This app calculates optimal sleep and wake times based on scientific sleep cycles. It also offers guided meditations and soothing sounds to help you relax and fall asleep faster.

Highlights

Sleep cycle calculation
Optimal wake time suggestions
Soothing sleep music
Guided meditation
Anxiety relief
Relaxation techniques

Features

Read full description

R90Sleepytime：科学计算睡眠周期、助眠音乐放松、冥想安抚焦虑，一套完整睡眠解决方案 R90睡眠周期计算器： - 熬夜后担心起床没精力？R90睡眠法告诉你最佳起床时间。 - 明早必须7点起床？立刻算出今晚该几点睡才能满血复活。 - 睡多久都累？用R90睡眠法找到你的完美睡眠公式。 - 学霸的秘密：用R90睡眠法把闹钟变成“精力开关”，醒来就是满格状态助眠： - 脑子静不下来？沉浸助眠音乐，快速切换至入睡状态 - 思绪纷杂无法入睡？听听助眠音乐。海浪/初春小雨/脑波/冥想/安静时光，伴随着放松的音乐安然入睡冥想词： - 当你失眠时，可以尝试简单冥想。通过反复诵念冥想词，身心就会自动进入放松模式

Screenshots

简研4 screens

R90 Sleepytime4 screens

Verdict

The call

The clearest difference is price: 简研 at Free against R90 Sleepytime's $0.99. 简研 also leads on iOS requirement (10.0 vs 17.0). R90 Sleepytime's advantage is update cadence (every 4 days vs every 5 weeks). 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

CostPrice · In-app purchases · Ads · Monetization

简研 is free to download; R90 Sleepytime costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

简研 ships an update every 5 weeks, R90 Sleepytime every 4 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 5 level

简研 versus R90 Sleepytime: the parameters behind the verdict, then further details
Parameter	简研	R90 Sleepytime
Price	Free — better	$0.99
Positive reviews	—	100.0% of reviews
Update frequency	Every 5 weeks	Every 4 days — better
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPod — better	iPhone
Requires iOS	10.0 — better	17.0
Further details — not scored
Size	101 MB	72 MB
Age rating	4+	4+
Developer	Shanghai Mudi Biotech Co., Ltd.	志加徐

In-app purchases

None

简研

No in-app purchases

None

R90 Sleepytime

No in-app purchases

Questions

Is 简研 free?

简研 is free to download, with no in-app purchases.

Is R90 Sleepytime free?

R90 Sleepytime costs $0.99, with no in-app purchases.

Do 简研 or R90 Sleepytime have ads?

Neither 简研 nor R90 Sleepytime shows ads.

Which is updated more often, 简研 or R90 Sleepytime?

简研 ships an update every 5 weeks, and R90 Sleepytime every 4 days. Most recently, 简研 was updated on October 29, 2026 and R90 Sleepytime on October 31, 2026.