# Flash Charge HK vs Merv

The clearest difference is in-app purchases: Flash Charge HK at none against Merv's 2. Flash Charge HK also leads on iOS requirement (14.0 vs 26.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Merv sells 2 in-app purchases, starting at $9.99 per month. Flash Charge HK asks for nothing beyond the download.

Flash Charge HK ships an update every 4 weeks, Merv fortnightly. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Flash Charge HK | Merv |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Size | 88 MB | 103 MB |
| Requires iOS | **14.0** | 26.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [LHC New Energy Company Limited](https://appshunter.io/developer/1567326674) | [Protective IQ Limited](https://appshunter.io/developer/1803557144) |

## What reviewers say

### Flash Charge HK

[App page](https://appshunter.io/ios/app/flash-charge-hk/id6748899216)

**In-app purchases:** none


### Merv

[App page](https://appshunter.io/ios/app/merv/id6749407173)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access (1 Month) | $9.99 | per month |
| All Access (1 Year) | $99.99 | per year |


## Frequently asked questions

### Is Flash Charge HK free?

Flash Charge HK is free to download, with no in-app purchases.

### Is Merv free?

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

### Do Flash Charge HK or Merv have ads?

Neither Flash Charge HK nor Merv shows ads.

### Which is updated more often, Flash Charge HK or Merv?

Flash Charge HK ships an update every 4 weeks, and Merv fortnightly. Most recently, Flash Charge HK was updated on October 13, 2026 and Merv on October 15, 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.*