# Knot Guide HD vs Periodic Timer

The clearest difference is price: Periodic Timer at Free against Knot Guide HD's $4.99. Periodic Timer also leads on update cadence (every 2 months vs every 12 months) and ratings volume (170 vs 23). Knot Guide HD's advantage is review sentiment (77% vs 52%) and iOS requirement (11.0 vs 18.0). On rating, ads and in-app purchases there is nothing between them.

Periodic Timer is free to download; Knot Guide HD costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.1 for Knot Guide HD against 4.1 for Periodic Timer. That said, the two scores are not equally well evidenced: Periodic Timer has 170 ratings behind it against 23, so its average is the more settled of the two. Written reviews are what separate them: 77% of Knot Guide HD's written reviews are positive against 52% of Periodic Timer's.

Knot Guide HD ships an update every 12 months, Periodic Timer every 2 months. The most recent releases landed on October 15, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Knot Guide HD | Periodic Timer |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.1 (23 ratings)](https://appshunter.io/ios/app/knot-guide-hd/id374225992/reviews) | **[4.1 (170 ratings)](https://appshunter.io/ios/app/periodic-timer-simple-repeat/id933241656/reviews)** |
| Number of ratings | 23 | **170** |
| Positive reviews | **77.4% of reviews** | 52.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 99 MB | 26 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Winkpass Creations, Inc.](https://appshunter.io/developer/288636661) | [Vladimir Kelin](https://appshunter.io/developer/933241655) |

## What reviewers say

### Knot Guide HD

[App page](https://appshunter.io/ios/app/knot-guide-hd/id374225992)

Learn to tie over 100 different knots with clear, step-by-step instructions and photographs. This app categorizes knots for easy browsing and provides detailed descriptions for each one, making it a practical tool for various activities.

**Highlights:** 107 unique knots, Clear, colorful photographs, Browse by category or knot name, Detailed knot descriptions, Categorized knot library

**Features:** macOS Compatibility

**In-app purchases:** none


### Periodic Timer

[App page](https://appshunter.io/ios/app/periodic-timer-simple-repeat/id933241656)

This app provides a simple, repeating interval timer that can run in the background without distracting you. It offers customizable alerts, quick start options, and prevents your screen from locking while active. Ideal for various activities like fitness, cooking, and learning.

**Highlights:** Repeating interval timer, Background operation, Customizable alerts (vibration/sound), Prevent lockscreen, Shake to start, Multiple timer output modes

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and intuitive interface
- ⏱️ Effective repeating/interval timer functionality
- 🎯 Does exactly what it's designed to do
- 🔇 Vibration-only option available
- 📱 Works in background with screen off

**What reviewers complain about**

- 🔊 Sound/notification issues (unreliable or missing)
- 💰 Aggressive premium upselling in free version
- 🐛 Timer cancels when phone is shaken
- 🔋 Activates heart rate sensor, drains battery
- 📵 Doesn't work reliably with screen locked

**Reported bugs**

- Sound/notifications fail to trigger despite settings enabled
- Timer cancels when phone is shaken or moved
- Vibration doesn't work when screen is locked or off
- App crashes on launch (especially after updates)
- Watch app crashes or doesn't function

**Requested features**

- Adjustable sound volume and custom alert sounds
- Customizable vibration patterns
- Settings menu for user preferences
- Ability to add notes/labels to timers
- Seconds-only timer option


## Frequently asked questions

### Is Knot Guide HD free?

Knot Guide HD costs $4.99, with no in-app purchases.

### Is Periodic Timer free?

Periodic Timer is free to download, with no in-app purchases.

### Which has better reviews, Knot Guide HD or Periodic Timer?

Periodic Timer is rated higher. Knot Guide HD averages 4.1 out of 5 from 23 ratings, while Periodic Timer averages 4.1 from 170 ratings.

### Do Knot Guide HD or Periodic Timer have ads?

Neither Knot Guide HD nor Periodic Timer shows ads.

### Which is updated more often, Knot Guide HD or Periodic Timer?

Knot Guide HD ships an update every 12 months, and Periodic Timer every 2 months. Most recently, Knot Guide HD was updated on October 15, 2026 and Periodic Timer on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*