# ChargerSync(legacy) vs MelonPay Sign

The clearest difference is update cadence: MelonPay Sign at every 6 days against ChargerSync(legacy)'s every 3 months. ChargerSync(legacy)'s advantage is iOS requirement (9.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ChargerSync(legacy) ships an update every 3 months, MelonPay Sign every 6 days. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ChargerSync(legacy) | MelonPay Sign |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/chargersynclegacy/id1477464170/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 11.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 85 MB | 15 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Chargedot Shanghai New Energy Technology Co., Ltd](https://appshunter.io/developer/1043403460) | [Melon Finance Limited](https://appshunter.io/developer/1666641005) |

## What reviewers say

### ChargerSync(legacy)

[App page](https://appshunter.io/ios/app/chargersynclegacy/id1477464170)

This app enhances the charging experience for owners of specific electric vehicle wall boxes. It offers features like account management, session control, charging schedule setup, and detailed cost and power statistics. It also includes safety features for power balancing.

**Highlights:** Manage multiple wall boxes, Start/stop charging sessions, Authorize RFID cards, View real-time charging data, Set charging schedules, Track charging costs, Balance charging power

**In-app purchases:** none


### MelonPay Sign

[App page](https://appshunter.io/ios/app/melonpay-sign/id6479333082)

**In-app purchases:** none


## Frequently asked questions

### Is ChargerSync(legacy) free?

ChargerSync(legacy) is free to download, with no in-app purchases.

### Is MelonPay Sign free?

MelonPay Sign is free to download, with no in-app purchases.

### Do ChargerSync(legacy) or MelonPay Sign have ads?

Neither ChargerSync(legacy) nor MelonPay Sign shows ads.

### Which is updated more often, ChargerSync(legacy) or MelonPay Sign?

ChargerSync(legacy) ships an update every 3 months, and MelonPay Sign every 6 days. Most recently, ChargerSync(legacy) was updated on October 23, 2026 and MelonPay Sign on October 4, 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.*