To Do vs Gengou Lib
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
To Do
Manage your daily tasks with a straightforward to-do list manager. Add, reorder, and prioritize your items, with support for basic notes to keep track of details. This free application offers essential task management functionality.
- Add to-do items
- Order and manage tasks
- Basic priority support
- Note support for tasks
- Free to use
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To Do is a simple, free To-Do list manager written as a favor for some friends. It provides barebones task management. You can add, order and manage your to do items. Basic priority and note support adds extra functionality.
Gengou Lib
Quickly convert between Japanese era names and Christian era years. Features include era and year searching, period and era pickers, and the ability to display the current year in either system. Texts can be shown in Japanese or English.
- Era and year search
- Period picker
- Era picker
- Christian era year picker
- Japanese era year picker
- Show this year button
- Multi-language text display
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"Gengou Lib." is a quick reference of the Japanese era system. This application has functions as below. - Era and Year Search - Period picker - Era picker - Christian era year picker - Japanese era year picker - Show this year button - Texts can be shown in Japanese or English independently of the default language setting. - Application badge can show this year number in the Japanese era or the Christian era. The Japanese era system identifies a year by the combination of the era name (Gengou or Nengou) and the year number within the era. For example, A.D. 2001 is Heisei 13. Please note that two Gengou schemes were used in Parallel from 1331 to 1392 during Nanboku-chō period. This application would be very useful if you are working with the governments, municipal offices and/or certain companies in Japan.
Screenshots
Verdict
The clearest difference is rating: To Do at 3.6 against Gengou Lib's 2.5. To Do also leads on ads (none vs shown) and update cadence (every 6 months vs every 61 months). Gengou Lib's advantage is review sentiment (84% vs 66%). On price, in-app purchases, monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
To Do holds the better App Store score, 3.6 against 2.5. That said, the two scores are not equally well evidenced: To Do has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 66% of To Do's written reviews are positive against 84% of Gengou Lib's, so the app with the better star average is not the one people write more warmly about.
To Do ships an update every 6 months, Gengou Lib every 61 months. The most recent releases landed on September 29, 2026 and August 13, 2026 respectively.
| Parameter | To Do | Gengou Lib |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (10 ratings) — better | 2.5 (2 ratings) |
| Positive reviews | 66.0% of reviews | 84.5% of reviews — better |
| Number of ratings | 10 — better | 2 |
| Update frequency | Every 6 months — better | Every 61 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Erica Sadun | Masayuki Akamatsu |
Customer experience
To Do
Gengou Lib
Bugs and requests
To Do
Reported bugs
3 issues- Losing task data after updates
- Cancel button not working in certain actions
- Inability to view full task details
Requested features
4 requests- Ability to mark tasks as complete
- Option to sort tasks by priority or due date
- Customizable task list layout
- Syncing or sharing capabilities
Gengou Lib
Not enough reviews yet to summarise bugs or requests.
In-app purchases
To Do
No in-app purchases
Gengou Lib
No in-app purchases
