# Stackd: Study Timer & Tracker — Pomodoro, calendar, graphs

> Pomodoro, calendar, graphs (iPhone/iPad app by Nene Nakagawa.)

- Source: https://appshunter.io/ios/app/stackd-study-timer-and-tracker/id6761293821 (this page in markdown: same URL + `.md`)
- Developer: [Nene Nakagawa](https://appshunter.io/developer/1821103094)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18 · 2 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-04-03
- Data updated: 2026-09-01
- User reviews in markdown: https://appshunter.io/ios/app/stackd-study-timer-and-tracker/id6761293821/reviews.md

## What is Stackd?

This is a simple study timer app that allows you to record and manage your study time by subject.

Simply measure your time with the timer and save it. You can also log sessions manually or add entries for past dates. You can record everything together, including subjects, study materials, pages, and notes. You can view the big picture of your studies by checking your subject balance with weekly graphs and reviewing your progress streaks on the calendar.

No ads, no social media features, and no account registration required. All data is saved on your device, so there are no privacy concerns. Perfect for anyone who wants to focus on learning, from exam preparation to certifications and language studies.

[Main Features]
- 3 timer modes (Stopwatch, Countdown, Pomodoro)
- Management of subjects, materials, pages, and notes
- Weekly graphs to check subject balance (bar chart & donut chart)
- Calendar to visualize study days with color-coding
- Display of consecutive study days (streaks)
- Daily study reminder
- Backup and data export functions

[Stackd Pro (One-time purchase)]
- Monthly graphs and cumulative line graphs
- Setting weekly goals and checking achievement rates
- 9 color themes
- Home screen and lock screen widgets

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Stackd Pro | $1.99 | one-time |



## Version history (last 5 releases)

### 1.2.2 — 2026-08-22

Improved timer stability and added an FAQ.

・Fixed an issue where the timer could stop unexpectedly on iOS 26
・You can now restore the timer if the app unexpectedly closes while timing
・Added an “FAQ” section to Settings with answers to common questions about how the timer works

### 1.2.1 — 2026-05-27

Minor UI improvements.

### 1.2 — 2026-05-14

Added a "Daily" tab to the monthly graph so you can track your study time day by day with a line chart.
Minor color palette adjustments.

### 1.1 — 2026-04-18

Added a Pomodoro timer and a countdown timer. Tap the icon in the top right of the Record tab to switch timer modes.

### 1.0.1 — 2026-04-06

Minor improvements and updates

## Apps similar to Stackd

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Study Time Record chart](https://appshunter.io/ios/app/study-time-record-chart/id6738596821) | — | Free | Education |
| [最強の勉強分析・記録SNS - StudyLegends](https://appshunter.io/ios/app/sns-studylegends/id6446177398) | — | Free | Education |
| [自動で勉強スケジュールを作成　べんすけ２](https://appshunter.io/ios/app/id6758376344) | — | Free | Education |
| [Retime: Study Timer & Planner](https://appshunter.io/ios/app/retime-study-timer-and-planner/id6736560691) | 5.0 (1) | Free | Education |
| [Gokaku Log: Study Timer](https://appshunter.io/ios/app/gokaku-log-study-timer/id6757664927) | — | Free | Education |
| [StudyRecord: Study Tracker](https://appshunter.io/ios/app/studyrecord-study-tracker/id6757600721) | — | Free | Education |

## More apps by Nene Nakagawa

- [Looply: Video Habits](https://appshunter.io/ios/app/looply-video-habits/id6763903145)

All apps by Nene Nakagawa: https://appshunter.io/developer/1821103094

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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 2026-09-01.*