# GRND: Study & Sleep Score — Track study, sleep, and goals

> Track study, sleep, and goals (iPhone/iPad app by SANTA KANEOKA.)

- Source: https://appshunter.io/ios/app/grnd-study-and-sleep-score/id6755229342 (this page in markdown: same URL + `.md`)
- Developer: [SANTA KANEOKA](https://appshunter.io/developer/1852720424)
- Category: Health & Fitness, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 52 MB
- Languages: American English, Japanese
- Released: 2026-09-05
- Data updated: 2026-10-10

## What is GRND?

Everything a learner tracks, in one app.

A study app, a sleep app, a to-do app. Three things to open, three things to log, and none of them stuck. GRND puts study, sleep, goals, to-dos, and your diary on the same screen, then turns the consistency of your days into a single score.

■ Tracked separately, they never add up
How late you went to bed and how well you focused today are connected. As long as they live in different apps, that connection stays invisible. GRND keeps them on one screen so the reason today went the way it did is readable in your own records.

■ Consistency, not duration
Going to bed at roughly the same time every night matters more for tomorrow than any single long night. Your score is built from both sleep duration and the variance in your bedtime.

■ Two taps to log
"Slept" at night, "Woke" in the morning. That's your sleep recorded. Study is one tap on the timer. The app is designed so that logging never becomes the reason you quit.

■ See that it is continuing
A visible streak makes yesterday a reason to keep going today. On days when the streak is about to break, you find out while there is still time.

■ What you can track
- Sleep (two taps / stopwatch / manual entry)
- Study (timer, Pomodoro, per subject)
- To-dos and goals with deadlines and reminders
- Diary
- Charts and the weekly review (Premium)

■ Your records stay yours
- Sign in with email or Google, sync across devices
- No ads. No behavioral tracking.
- Delete your account and all data from inside the app

■ Who this is for
- Exams, certifications, reskilling - anyone who keeps learning
- Students and professionals whose schedule has drifted
- People who log study hours but never look at their sleep
- Anyone who has abandoned a tracking app before

Logging is free. Charts and the weekly review are part of Premium (auto-renewing); pricing is shown in the app.

This app is not a medical device. The score is a reference for reflecting on your habits and is not intended to diagnose, treat, or prevent any condition. Consult a physician for concerns about your sleep or health.

Privacy Policy: https://createdigging.github.io/grnd-docs/privacy.en.html
Terms of Use: https://createdigging.github.io/grnd-docs/terms.en.html
Support: https://createdigging.github.io/grnd-docs/support.en.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| プレミアム月額プラン | $0.99 | per month |
| プレミアム年額プラン | $11.99 | per year |


## Is GRND safe?

Not enough ratings yet to assess GRND.

## Is GRND legit?

GRND: Study & Sleep Score has limited verification signals. The AppsHunter Legitimacy Score for GRND is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.0.5 — 2026-10-05

A redesigned Home. Your first 7 days are shown as an experiment, with sleep, study and todos on one strip. The bedtime window and morning coach are open for your first 7 days.
- A shorter 2-screen intro that lets you log your first entry right away
- Fixed the bedtime target showing as "passed" during the day
- Fixed tab labels being cut off

### 1.0.4 — 2026-09-28

Rebuilt sync: your study goals and subjects now stay put after switching devices, reinstalling, or signing out.
Redesigned the Sleep tab — log a night with two taps.
Apple Health is now an option in Settings.
Added automatic crash reporting (error details only, nothing that identifies you).

### 1.0.3 — 2026-09-10

GRND is now available in English.

You can import your sleep from Apple Health. Choose your source the first time you open the app - manual entry stays available - and switch any time from Settings. Existing records are never overwritten.

### 1.0.2 — 2026-09-09

・記録が続いている方に、レビューのお願いを表示するようにしました。
・細かな不具合を修正し、動作を改善しました。

### 1.0.1 — 2026-09-08

睡眠まわりの不具合をまとめて修正しました。

・睡眠記録の日付が翌日にずれることがある問題を修正
・深夜に就寝した記録がグラフに表示されない問題を修正
・就寝時に開始して朝に終了する睡眠ストップウォッチが、一晩の記録に対応
・曜日や週・月の集計が1日ずれることがある問題を修正
・睡眠スコアの計算を、アプリ内の説明どおり(生活リズムの規則性を反映)に統一
・1日の区切りを午前4時に統一。深夜の学習も同じ日の記録として扱われます
・オフラインでの編集がサインイン後に元に戻ってしまう問題を修正

また、端末の言語が英語の場合に英語で表示されるようになりました。

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## Related topics

[sleep study app](https://appshunter.io/ios/topics/sleep-study-app)

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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 2026-10-10.*