When'd I vs J Plan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
When'd I
This app helps you track when you last performed specific tasks or activities. It provides a visual timeline, allows for photo and note attachments, and offers home screen widgets for quick logging and viewing overdue items. An optional daily nudge can remind you to log activities.
- Log last activity date
- Visual timeline with time gaps
- Attach photos and notes
- Home screen widgets
- Lock screen logging
- Optional evening nudge
- On-device data storage
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Stop managing to-dos. Just remember when you last did it. "When did I last wash the sheets?" "When did I change the water filter?" "When did I last call my parents?" Some things you can never remember. When'd I records just the date you did them. No goals, no nagging notifications, no checklists. Tap once and it's logged as today. ■ See how long it's been Every item shows the days since you last did it. The longer it's been, the more it stands out. ■ A timeline where distance means time The space between dots is the actual gap between dates. Busy stretches look dense. The months you skipped show up as empty space. ■ Photos and notes Attach one photo and a short note to any record. ■ Widgets and Lock Screen Check what's overdue from your Home Screen, and log without opening the app. You can even record straight from the Lock Screen. (iOS 16.4+) ■ An optional evening nudge Once a day, if you want it. Off by default. ■ Entirely on your device No account, no server, no ads. Your records stay on your phone. Export and import backup files yourself, and an automatic iCloud copy brings everything back if you switch phones or reinstall. ■ Buy once One purchase unlocks everything. No in-app purchases, no subscriptions, no ads.
J Plan
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There are only 24 hours in a day. See your time clearly, then plan it. J Plan lays out your entire day on a 10-minute grid, so you can instantly see what’s scheduled and where you still have room. Adding plans is just as simple: tap or drag directly on the timeline to put things exactly where they fit. Whether it’s work, classes, workouts, shifts, business trips, or everyday plans, J Plan helps you organize your time with less effort and more clarity. 【Plan Your Day on a Time Grid】 ・Full 24-hour timeline in 10-minute intervals ・Tap an empty slot to quickly add an event ・Press and drag to select the exact time you want ・Press and hold an event to move it ・Drag the edges to adjust the start or end time ・Prevents overlapping events to reduce scheduling conflicts ・Organize events with custom categories and colors 【Set Repeating Events Once】 Meetings, classes, workouts, shifts — no need to create the same event again and again. ・Repeat weekly, monthly, or yearly ・Edit only this occurrence ・Or update this and all future events 【Tasks and Events, Together】 Some things need a specific time. Others just need to get done today. ・Assign tasks to a specific date ・Link tasks to events so their time moves together ・Completed tasks are automatically moved to the Completed list ・Haptic feedback when you check off a task Keep your schedule and to-dos in one place, so you can see both where you need to be and what still needs to get done. 【Plan the Whole Month at a Glance】 The monthly calendar is ideal for shifts, days off, travel, business trips, and other all-day plans. ・View all-day events across the entire month ・Create custom Quick Add labels for one-tap entry ・Select multiple dates and add the same all-day event at once ・Select and delete multiple all-day events in batches ・Press and drag an all-day event to move or copy it to another date ・Share the entire month as an image Plan shifts, time off, and trips without repeating the same steps day by day. 【Works with Your System Calendar and Reminders】 Keep using the calendar you already have. ・View system calendar events inside J Plan ・View system reminders ・Mark reminders as completed directly in J Plan ・Event notifications ・Today’s Schedule widget ・Today’s Tasks widget ・Calendar widget ・Share your day as an image Your calendar and reminders are accessed only after you grant permission. 【Make J Plan Yours】 ・5 theme colors ・Light and Dark appearance ・Designed for iPhone and iPad ・Traditional Chinese, Simplified Chinese, English, Japanese, and Korean 【Your Schedule Stays on Your Device】 No account required. J Plan stores its data on your device. One less account to create, one less thing to worry about. See your time clearly. Plan it better. Plan your day with J Plan.
Screenshots
Verdict
The clearest difference is update cadence: J Plan at daily against When'd I's every 4 days. J Plan also leads on price ($1.99 vs $3.99). When'd I's advantage is iOS requirement (15.0 vs 17.0). 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
When'd I costs $3.99 and J Plan $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
When'd I ships an update every 4 days, J Plan daily. Both last shipped on November 6, 2026.
| Parameter | When'd I | J Plan |
|---|---|---|
| Price | $3.99 | $1.99 — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 90.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 days | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 34 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | HyunWoo Lee | Wen Wei Li |
In-app purchases
When'd I
No in-app purchases
J Plan
No in-app purchases









