SEVENFRIDAY vs Catendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SEVENFRIDAY
This app lets you authenticate and register your luxury watches. Join a global community that values making the most of every day. As a registered member, you can expect future benefits and features.
- Authenticate NFC-chipped watches
- Register watch ownership
- Join global community
- Receive future member benefits
- Access luxury product information
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SEVENFRIDAY is a lifestyle brand that offers industrially inspired watches and luxury products. Our global community shares common values around making the best of every day. This free application allows you to authenticate and register your watch. You can authenticate NFC-chipped SEVENFRIDAY watches and register for ownership. Registration enrolls you to the SEVENFRIDAY community, over time you can expect more benefits and features as a SEVENFRIDAY community member.
Catendar
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Catendar is a cute cat shift calendar for nurses and every shift worker, with a simple budget diary built in. Shift schedule See Day, Evening, Night and Off at a glance, each in its own color. Add and rename shift types however your job needs. Fill a repeating rotation across the month in one go with Pattern Fill. A calendar that fits on one screen Under the calendar you get a summary of the selected day's schedule and money, plus this month's totals. Tap a line to open the full list. Income and expense ledger Pick a category such as Food, Cafe, Transport or Home and the entry saves without typing anything else. Daily income and expenses are totaled by month automatically. Choose won, dollar, yen, yuan, Taiwan dollar or euro. Monthly report Your shifts by type, this month's income, spending and top spending categories on one card you can save and share as an image. Schedules and notes Record appointments, clinic visits and to-dos by date, with a reminder at the time you choose. Your own cat Pick one of eight cats for the home screen and the calendar greeting. A new title is chosen on the 1st of each month based on last month's activity. Share and back up Turn this month's shift table into an image to send to a friend. Export and import a backup file so your records move with you to a new device. Local notifications Reminders for shifts, appointments and notes fire on the device itself and never pass through a server. Seven languages Korean, English, Japanese, Simplified Chinese, Traditional Chinese, Spanish and French, switchable inside the app at any time. No account is needed, and every record stays on your device.
Screenshots
Verdict
The clearest difference is in-app purchases: Catendar at none against SEVENFRIDAY's 2. Catendar also leads on update cadence (every 5 days vs every 3 weeks). SEVENFRIDAY's advantage is ads (none vs shown). On price, device support and iOS requirement 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. SEVENFRIDAY sells 2 one-off in-app purchases. Catendar asks for nothing beyond the download.
SEVENFRIDAY ships an update every 3 weeks, Catendar every 5 days. Both last shipped on October 24, 2026.
| Parameter | SEVENFRIDAY | Catendar |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (9 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 84 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | SEVENFRIDAY AG | Bumjoon Lee |
In-app purchases
SEVENFRIDAY
- NFT Collectible$24.99
- NFT for watch$24.99
Catendar
No in-app purchases









