# Thermometer vs 心流島

The clearest difference is update cadence: Thermometer at every 2 weeks against 心流島's every 8 months. Thermometer also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Thermometer sells 6 in-app purchases, starting at $5.99 per 7 days and 心流島 sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Thermometer ships an update every 2 weeks, 心流島 every 8 months. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Thermometer | 心流島 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (407 ratings)](https://appshunter.io/ios/app/thermometer-body-temperature/id6683301324/reviews)** | — |
| Number of ratings | **407** | — |
| Positive reviews | 32.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 10 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [199 Developments Private Limited](https://appshunter.io/developer/1531051207) | [SY YUAN CHEN](https://appshunter.io/developer/1836289668) |

## What reviewers say

### Thermometer

[App page](https://appshunter.io/ios/app/thermometer-body-temperature/id6683301324)

Estimate body temperature using your smartphone without a physical thermometer. Track heart rate, blood pressure, and sync with Apple Watch for real-time fever alerts. Log custom health data and generate shareable PDF reports.

**Highlights:** Temperature estimation without a thermometer, Apple Watch Series 8 sync for readings, High fever alerts, Blood pressure tracking and trend analysis, Custom health logs with notes, Apple Health sync, Shareable PDF reports

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week- Body Temperature Checker | $5.99 | per 7 days |
| Year Promo- Body Thermometer | $19.99 | per year |
| Year- Body Temperature Checker | $29.99 | per year |
| Yearly- Body Fever Checker | $29.99 | per year |
| Yearly - Thermometer + Blood Oxygen | $29.99 | per year |
| Lifetime- Body Fever Checker | $49.99 | one-time |

**What reviewers like**

- 🚀 Accurate temperature readings
- 👍 Helpful for tracking health issues
- 👍 Useful when no thermometer is available
- 👍 Reliable app with good support

**What reviewers complain about**

- 🐛 Inaccurate temperature readings
- 💰 Expensive subscription
- 🤖 Outdated user interface
- 🤔 Unclear free vs. premium features

**Reported bugs**

- Subscription issues and unexpected charges
- App not functioning as advertised

**Requested features**

- Option to default to Fahrenheit
- Ability to share breathing exercises
- Improved compatibility with newer devices


### 心流島

[App page](https://appshunter.io/ios/app/5/id6756066211)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月方案 | $0.99 | per month |
| 年方案 | $9.99 | per year |


## Frequently asked questions

### Is Thermometer free?

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

### Is 心流島 free?

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

### Do Thermometer or 心流島 have ads?

Neither Thermometer nor 心流島 shows ads.

### Which is updated more often, Thermometer or 心流島?

Thermometer ships an update every 2 weeks, and 心流島 every 8 months. Most recently, Thermometer was updated on October 17, 2026 and 心流島 on October 11, 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.*