PET vs Knot Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PET
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This app is designed to support the management of smart pet devices, allowing users to connect, control, and monitor compatible devices through their mobile phone in a simple and efficient way. With this app, users can connect supported smart pet devices and manage basic device settings directly from their phone. The app provides access to common training and control functions, allowing users to adjust parameters based on their individual needs and usage scenarios. The interface is designed to be clear and easy to use, helping users quickly understand and operate the available functions. All features focus on device management and daily use, avoiding unnecessary complexity. The app also provides basic activity and usage information related to the connected device. These records are intended to help users better understand device usage and general activity patterns. All displayed data is for reference only and may vary depending on the device model and usage conditions. This app is intended to be used as a companion tool for smart pet devices. It does not replace professional advice or training services. Actual results may vary based on device configuration, usage methods, and individual pet behavior. Key features: 1. Smart pet device connection and management 2. Training and control function settings 3. Device parameter adjustment 4. Basic activity and usage data display 5. Simple and intuitive user interface The app aims to provide a stable and user-friendly experience for managing smart pet devices, supporting safer and more organized daily use.
Knot Diary
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Human emotions are extremely complex, just like a tangled ball of yarn. In Knot Diary, you can write down your emotions and what happens every day, just like a regular diary. Tie a knot on the yarn — whether you are happy or sad, no matter what emotion it is, you can record it all. Your records will grow bigger and bigger, like a ball of yarn. Don't forget to tap the yarn to unroll it and review your records! Knot Diary also supports customizing the style of your hand-drawn knots — don't forget to try this feature. Knot Diary welcomes your use. If you run into any problems while using it, feel free to leave us a message, and I will keep improving. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: PET at none against Knot Diary's 3. PET also leads on iOS requirement (13.0 vs 17.0). Knot Diary's advantage is update cadence (every 11 days vs monthly). On price, ads 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. Knot Diary sells 3 in-app purchases, starting at $0.99 per month. PET asks for nothing beyond the download.
PET ships an update monthly, Knot Diary every 11 days. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.
| Parameter | PET | Knot Diary |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 46 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | 金芳 éƒ | 桃花 秦 |
In-app purchases
PET
No in-app purchases
Knot Diary
- Knot Diary Pro (Monthly)$0.991 Month
- Knot Diary Pro (Quarterly)$2.993 Months
- Knot Diary Pro (Yearly)$6.991 Year








