# umcode vs Voltage

The clearest difference is in-app purchases: umcode at none against Voltage's 5. umcode also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18.2). Voltage's advantage is update cadence (every 5 days vs fortnightly). On price and ads there is nothing between them.

Both are free to download. Voltage sells 5 one-off in-app purchases. umcode asks for nothing beyond the download.

umcode ships an update fortnightly, Voltage every 5 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | umcode | Voltage |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (11 ratings)](https://appshunter.io/ios/app/voltage-volt-ampera-bolt-obd/id6774315064/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 241 MB | 75 MB |
| Requires iOS | **15.6** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [深圳市悠悠汇网络科技有限公司](https://appshunter.io/developer/1698967002) | [Oleksandr Radchenko](https://appshunter.io/developer/6774315066) |

## What reviewers say

### umcode

[App page](https://appshunter.io/ios/app/umcode/id6772873985)

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

**In-app purchases:** none


### Voltage

[App page](https://appshunter.io/ios/app/voltage-volt-ampera-bolt-obd/id6774315064)

This app provides advanced diagnostics and control for specific Chevrolet and Opel electric and hybrid vehicles. It helps clear fault codes, monitor battery health, and manage vehicle functions remotely. Get detailed insights into your car's performance and avoid costly repairs.

**Highlights:** Clear SHVCS and BECM faults, Monitor battery health and cell voltages, Track usable capacity and degradation, Remote vehicle control (start, climate), Deep DTC scanning and module reset, Live parameter monitoring, Tire rotation and charging schedule

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ELR / Volt Design activation | $6.99 | one-time |
| Traffic Signs Activation (discount) | $9.99 | one-time |
| ELR / Volt Design activation | $14.99 | one-time |
| Traffic Signs Activation | $19.99 | one-time |
| Premium upgrade | $24.99 | one-time |


## Frequently asked questions

### Is umcode free?

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

### Is Voltage free?

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

### Do umcode or Voltage have ads?

Neither umcode nor Voltage shows ads.

### Which is updated more often, umcode or Voltage?

umcode ships an update fortnightly, and Voltage every 5 days. Most recently, umcode was updated on October 31, 2026 and Voltage on November 5, 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.*