# Smart Flow Metering vs CoolGuard

The clearest difference is in-app purchases: Smart Flow Metering at none against CoolGuard's 3. Smart Flow Metering also leads on update cadence (every 2 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CoolGuard sells 3 one-off in-app purchases. Smart Flow Metering asks for nothing beyond the download.

Smart Flow Metering ships an update every 2 days, CoolGuard weekly. The most recent releases landed on October 4, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Smart Flow Metering | CoolGuard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/coolguard/id6801791826/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | — | Free |
| Size | 59 MB | 7 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kulmi Digital Agency Limited](https://appshunter.io/developer/1845158824) | [Norbert Pentek](https://appshunter.io/developer/1884922906) |

## What reviewers say

### Smart Flow Metering

[App page](https://appshunter.io/ios/app/smart-flow-metering/id6795587223)

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

**In-app purchases:** none


### CoolGuard

[App page](https://appshunter.io/ios/app/coolguard/id6801791826)

This app monitors your phone's temperature, providing real-time heat levels and alerts to prevent performance issues and battery aging. It also functions as a customizable night clock with alarms and displays local weather information.

**Highlights:** Live heat level monitoring, Heat trend and log with map, Customizable alerts and cooling tips, Night clock with sleep mode, Multiple alarms with system integration, Outdoor weather display, Lock screen and Dynamic Island widgets

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small tip | $0.99 | one-time |
| Medium tip | $2.99 | one-time |
| Large tip | $9.99 | one-time |


## Frequently asked questions

### Is Smart Flow Metering free?

Smart Flow Metering is free to download, with no in-app purchases.

### Is CoolGuard free?

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

### Do Smart Flow Metering or CoolGuard have ads?

Neither Smart Flow Metering nor CoolGuard shows ads.

### Which is updated more often, Smart Flow Metering or CoolGuard?

Smart Flow Metering ships an update every 2 days, and CoolGuard weekly. Most recently, Smart Flow Metering was updated on October 4, 2026 and CoolGuard on October 6, 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.*