TimeLog vs MustDo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TimeLog
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Do you keep a diary? I've tried using various diary apps and paper diaries to see if I could stick with it. But... I couldn't keep it up. Even though I thought, “I should keep a diary! I have to keep one...” I just couldn't make it a habit. That's because... I had to think about what to write. Even if I tried to write at the end of the day, I'd end up thinking, “Huh... what did I even do today?” and using up mental energy just trying to remember. Then, actually writing the diary entry felt like too much trouble. But I still want to keep a record of my days! Well... I have good news for you. This app shows the exact time the moment you press the timestamp button, letting you instantly jot down whatever you want to record. It makes keeping track super easy. It's great for daily journaling, work notes, organizing your thoughts—anything really. You don't even have to press the timestamp button; you can just use it as a memo. And later, when you need to find something, adding tags makes searching a breeze. Plus! It posts to Google Calendar too. So when you wonder, “What did I do that day...?” Or “What was that meeting about last time...?” Just sync everything to Google Calendar, and finding it later is a breeze. ▼ Now supports various communication tools. ■ If you use LINE, Slack, Teams, Messenger, WhatsApp, etc., you can share necessary notes. ▼ Recommended for: ■ Those who want to reflect on their daily activities ■ Those looking to reassess how they use their time ■ Those seeking a simple note-taking app ■ Those wanting to start keeping a life log ▼ Main Features 【Timestamp】 Automatically inserts the current time with a single tap. No need for tedious time input. 【Daily Notes】 Freely record your daily goals and reflections. Separate from the timeline, you can capture your thoughts for the day. 【Tag Management】 Organize notes by adding tags. Easily search and sort later. 【Folder Organization】 Create folders to categorize notes. Freely classify them for work, personal use, etc. 【Calendar Integration】 Sync with Google Calendar. 【Sharing】 Easily share via LINE, email, PDF, etc. Simple sharing with teams or family! ▼ Basic Features Available in Free Version ・Create timestamped notes ・Save up to 10 files ・Create up to 3 tags ・Share as PDF/text ▼ Premium ・Unlimited files ・Unlimited tags ・Google Calendar integration ・Ad-free. ■ Privacy All memo data is stored locally on your device. No account registration required. Data is never sent externally unless you use Google Calendar integration. Simple design makes it easy to stick with. Record your everyday moments.
MustDo
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"I'll do it later." Later never came. The notification came and went while your phone was face down on the table. MustDo is for the things you cannot let slide. Add a to-do and a time. At that time, a real alarm rings and keeps ringing until you stop it. Stopping it means you did it. Not yet? Snooze until you do. ■ A real alarm, not a notification MustDo uses AlarmKit, the same system behind the Clock app's alarms. It rings full screen. It rings through Silent mode and Focus. It keeps ringing until you reach over and stop it. A notification you can swipe away is not a reminder. ■ Stop it when it's done Stopping the alarm marks the to-do as done, and it moves to Completed in the Today tab. Tapped Done by mistake? Swipe left to undo. ■ Not yet? Snooze until you do it "10 min", "1 hour" and "Tomorrow" are right on the alarm screen and in the Live Activity on the Lock Screen. It comes back and rings again, as many times as it takes. Tomorrow rings at the same time, or at a fixed morning time if you set one. ■ Repeats Daily, or weekly on the days you pick. The medicine at 9 PM, the bins on Tuesday, the report every Friday. Snoozing a repeating to-do to Tomorrow skips today's occurrence only. ■ Your to-dos stay in your iCloud Everything is stored in your own iCloud (CloudKit private database) and synced across your devices by Apple. MustDo has no server that stores your to-dos. No account, no sign-in. ■ Add with Siri and Shortcuts Say “Add a to-do in MustDo” to Siri and it's saved with an alarm set, without opening the app. Ask for “Today's to-dos in MustDo” to hear what's left. Also works from the Action button and the Shortcuts app. ■ Add to-dos from AI (MCP) A small MCP server for your Mac lets Claude and other AI clients read and add your to-dos, straight into your iCloud. Tell your assistant what needs doing; MustDo rings until it's done. ■ Make it yours 25 alarm sounds, or vibrate only. Light, dark, or match your device. Optional Face ID lock: alarms still ring and can be stopped while the app is locked. ■ Free for 30 days, then a subscription Try everything for 30 days. After that, a subscription (monthly or yearly, auto-renewing) is needed to add new to-dos. To-dos you have already added keep ringing without one, and you can still stop, snooze and delete them. An app like this should never go quiet because of billing. Requires iOS 26 or later. Website and user guide: https://ltng.jp/mustdo Privacy Policy: https://ltng.jp/mustdo/privacy Terms of Use: https://ltng.jp/mustdo/terms
Screenshots
Verdict
The clearest difference is update cadence: MustDo at every 3 days against TimeLog's every 3 weeks. On price, 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
Both are free to download. TimeLog sells 1 in-app purchase, starting at $1.99 per month and MustDo sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
TimeLog ships an update every 3 weeks, MustDo every 3 days. The most recent releases landed on October 30, 2026 and November 12, 2026 respectively.
| Parameter | TimeLog | MustDo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.1 | 26.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Tomohiko Yasui | Lightning LLC. |
In-app purchases
TimeLog
- TimeLog Premium (Monthly)$1.991 Month
MustDo
- Monthly$0.991 Month
- Yearly$7.901 Year









