# Calflow vs 线岛

The clearest difference is ratings volume: Calflow at 131 against 线岛's 1. 线岛's advantage is review sentiment (100% vs 89%). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Calflow sells 3 in-app purchases, starting at $3.99 per month and 线岛 sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Calflow against 5.0 for 线岛. That said, the two scores are not equally well evidenced: Calflow has 131 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 89% of Calflow's written reviews are positive against 100% of 线岛's.

Calflow ships an update every 10 days, 线岛 every 9 days. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Calflow | 线岛 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (131 ratings)](https://appshunter.io/ios/app/calflow-planner-and-tracker/id6474122188/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6743368245/reviews)** |
| Number of ratings | **131** | 1 |
| Positive reviews | 88.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 9 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 183 MB | 14 MB |
| Requires iOS | 17.0 | **16** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kyovan Ltd.](https://appshunter.io/developer/1712594394) | [强 李](https://appshunter.io/developer/1449686959) |

## What reviewers say

### Calflow

[App page](https://appshunter.io/ios/app/calflow-planner-and-tracker/id6474122188)

This app integrates with your existing iOS Reminders and Calendars to help you track how you spend your time. It offers features for daily planning, time tracking, and goal setting, providing insights into your productivity within the Apple ecosystem.

**Highlights:** 2-way sync with iOS Reminders & Calendar, Time tracking for reminders and events, Time distribution insights, Powerful tag system for filtering, Goal and habit tracking, Apple Health and app usage sync

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly plan | $3.99 | per month |
| Annual plan | $12.99 | per year |
| One-time  purchase | $37.99 | one-time |

**What reviewers like**

- ⏱️ Excellent time tracking with automatic logging
- 📱 Seamless cross-device synchronization (iPhone, iPad, Mac, Apple Watch)
- 📅 Perfect integration with Apple Calendar and Reminders
- 🎯 Comprehensive goal-setting and insights features
- 🧩 Simple, intuitive user interface with low friction

**What reviewers complain about**

- 🐛 Timer synchronization issues across devices
- 🐛 Confusing insights calculation (double-counting existing calendar events)
- 🐛 Apple Watch complications not fully functional
- 🌙 No dark mode support
- 📱 iPad lacks some features available on iPhone

**Reported bugs**

- Timer doesn't sync across devices (iPhone to iPad/Mac)
- Live Activity not showing on iPad when timer active
- Apple Watch timers not accessible on other devices
- Widget display showing only black and white screen
- Insights double-counting time on existing calendar events

**Requested features**

- Dark mode support
- Mac menu bar timer widget
- Multiple simultaneous timers on iPhone
- Larger font size options
- Ability to copy and paste calendar events


### 线岛

[App page](https://appshunter.io/ios/app/id6743368245)

This app helps crafters meticulously track and manage their yarn inventory. Record yarn details with images, update usage, and gain an overview of your collection's quantity, cost, and remaining material. Offers advanced features for subscribers.

**Highlights:** Yarn information recording with images, Usage tracking and deletion, Collection overview (quantity, cost, remaining), Card-style waterfall display of yarn, Customizable tags and filters, Unlimited yarn data addition

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 线岛专业版月度订阅 | $0.99 | per month |
| 线岛专业版年度订阅 | $5.99 | per year |


## Frequently asked questions

### Is Calflow free?

Calflow is free to download, with in-app purchases available.

### Is 线岛 free?

线岛 is free to download, with in-app purchases available.

### Which has better reviews, Calflow or 线岛?

线岛 is rated higher. Calflow averages 4.9 out of 5 from 131 ratings, while 线岛 averages 5.0 from 1 ratings.

### Do Calflow or 线岛 have ads?

Neither Calflow nor 线岛 shows ads.

### Which is updated more often, Calflow or 线岛?

Calflow ships an update every 10 days, and 线岛 every 9 days. Most recently, Calflow was updated on November 8, 2026 and 线岛 on October 30, 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.*