# WATT EV CHARGING vs ERP 2.0

The clearest difference is ads: ERP 2.0 at none against WATT EV CHARGING's shown. WATT EV CHARGING's advantage is update cadence (every 5 days vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

WATT EV CHARGING ships an update every 5 days, ERP 2.0 every 3 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | WATT EV CHARGING | ERP 2.0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (2 ratings)](https://appshunter.io/ios/app/erp-20/id6449014348/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 months |
| Monetization | — | Free |
| Size | 152 MB | 27 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [WATT](https://appshunter.io/developer/1593867237) | [Land Transport Authority (Singapore)](https://appshunter.io/developer/480951213) |

## What reviewers say

### WATT EV CHARGING

[App page](https://appshunter.io/ios/app/watt-ev-charging/id1617293408)

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

**In-app purchases:** none


### ERP 2.0

[App page](https://appshunter.io/ios/app/erp-20/id6449014348)

Access and display information from your On-Board Unit (OBU), including charging details and traffic alerts. Connects via Bluetooth for background notifications and supports CarPlay for in-car system integration.

**Highlights:** Access OBU charging details, Receive traffic alerts, View payment options, Bluetooth connectivity, Background notifications, CarPlay compatibility

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

**In-app purchases:** none


## Frequently asked questions

### Is WATT EV CHARGING free?

WATT EV CHARGING is free to download, with no in-app purchases.

### Is ERP 2.0 free?

ERP 2.0 is free to download, with no in-app purchases.

### Do WATT EV CHARGING or ERP 2.0 have ads?

WATT EV CHARGING shows ads; ERP 2.0 does not.

### Which is updated more often, WATT EV CHARGING or ERP 2.0?

WATT EV CHARGING ships an update every 5 days, and ERP 2.0 every 3 months. Most recently, WATT EV CHARGING was updated on October 27, 2026 and ERP 2.0 on October 27, 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.*