Dayji vs sf_ota
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dayji
This app helps you record your daily thoughts and memories with features like monthly summaries, photo galleries, and customizable themes. It offers iCloud synchronization and CSV export for easy data management and access across devices.
- Monthly summary memos
- Photo gallery per day
- iCloud backup and sync
- CSV export
- Password lock
- Customizable themes and font size
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A simple diary app that allows you to view entries on a monthly basis. It supports synchronization with iCloud and allows you to export your diary entries in CSV format. ■ Two selectable display styles: List View and Monthly View List View displays entries in a list format, showing only the dates on which entries were written. Monthly View displays all dates in advance. You can choose the display method that suits you best. ■ Ability to write summary memos for each month This feature allows you to easily reflect on what you have been doing. It also helps you remember what happened in a particular month when looking back. ■ Favorites feature You can easily access important diary entries and quickly retrieve the necessary information. ■ Photo gallery for each day's captured photos You can easily browse photos taken on specific dates, enhancing your memory of past events. Even when writing diary entries at a later date, it will be easier to recall the events of that day. Additionally, you can add photos without manual effort, making diary writing stress-free. ■ Visual division by week for easy viewing Similar to how calendars are divided into weeks, this app also provides visual divisions for each week. ■ Easily identify days without diary entries to prevent forgetting The app displays the number of diary entries for each month, encouraging you to write a diary entry every day. It helps maintain the habit of writing a diary. ■ Write diary entries in plain text You can write diary entries in plain text, freeing yourself from the hassle of formatting text. ■ Character counter to track the number of words A character counter allows you to quickly see how much you have written, helping you keep track of your progress. ■ Supports backup in CSV format You can back up your diary entries and easily store the data externally. ■ Compatible with Mac for editing and viewing on any device Since it is also compatible with Mac, you can edit your diary entries on any device that suits your convenience. ■ Customizable theme colors You can change the theme colors to your liking, selecting colors that match your preferences. ■ Adjustable font size You can change the font size according to your preference. If the text is too small or too large to read comfortably, you can adjust it to a size that suits you. ■ Backup and synchronization across devices using iCloud You can back up your diary entries using iCloud, eliminating the worry of data loss. It also allows sharing and editing of entries across different devices. ■ Lock the app with a password You can lock the app with a password, ensuring the security of your diary.
sf_ota
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sf_ota是一款给特定打印机升级打印机固件的软件。支持通过蓝牙通信的方式给打印机升级固件程序。此软件会自动判断当前打印机的固件类型和版本,并跟远程服务器的类型和版本进行比较,实现智能升级固件程序。
Screenshots
Verdict
The clearest difference is update cadence: sf_ota at every 3 days against Dayji's every 2 months. sf_ota also leads on iOS requirement (12.0 vs 26.0). Dayji's advantage is device support. On price and in-app purchases 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.
Dayji ships an update every 2 months, sf_ota every 3 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | Dayji | sf_ota |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (8 ratings) — better | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | — |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac — better | — |
| Requires iOS | 26.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Daichi Kato | Shenzhen Weida Technology Co., Ltd. |
In-app purchases
Dayji
No in-app purchases
sf_ota
No in-app purchases









