# Amperes 4 vs ServerKeep

The clearest difference is price: ServerKeep at Free against Amperes 4's $2.99. Amperes 4's advantage is in-app purchases (none vs 1) and chart position (#181 vs unranked). On update cadence, ads and iOS requirement there is nothing between them.

ServerKeep is free to download; Amperes 4 costs $2.99 up front. ServerKeep sells 1 one-off in-app purchase. Amperes 4 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Amperes 4 | ServerKeep |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.4 (652 ratings)](https://appshunter.io/ios/app/amperes-4-battery-charge-info/id1245475416/reviews)** | — |
| Number of ratings | **652** | — |
| Positive reviews | 46.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Best chart rank | **#181** | — |
| Size | 36 MB | 8 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CrioSoft LLC](https://appshunter.io/developer/1245475415) | [Desmond Kramer](https://appshunter.io/developer/1877358250) |

## What reviewers say

### Amperes 4

[App page](https://appshunter.io/ios/app/amperes-4-battery-charge-info/id1245475416)

**Currently charting:** #181 Top Paid · Utilities (US App Store)

This app helps you understand your device's charging performance. It diagnoses charging issues, compares different charging methods, and monitors battery health with detailed data and alarms. Get insights into your power setup for optimal device longevity.

**Highlights:** Battery charging rates (mA and wattage), Hardware comparison testing, Detailed charging graphs, Global charging speed benchmarking, Intelligent battery alarms, System vital monitoring

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Uniquely useful
- 🚀 Only way to test charging
- 👍 Probando
- 👍 Used for YEARS
- 👍 Works well despite limited / restricted OS functions

**What reviewers complain about**

- 🐛 Does not work on iPhone as advertised
- 🐛 Doesn't give rate of charge
- 🐛 Useless on newer iOS
- 🐛 Slow and useless
- 🐛 Fraudulent App

**Reported bugs**

- Charging test results in total nonsense
- Doesn't work on iPad in landscape mode
- Login screen freezes
- Incompatible with older devices

**Requested features**

- Dark mode option
- Advanced analytics dashboard
- Ability to save charger/wire names
- Ability to monitor charging in the background


### ServerKeep

[App page](https://appshunter.io/ios/app/serverkeep/id6759196608)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Server Monitor - ServerKeep | $9.99 | one-time |


## Frequently asked questions

### Is Amperes 4 free?

Amperes 4 costs $2.99, with no in-app purchases.

### Is ServerKeep free?

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

### Do Amperes 4 or ServerKeep have ads?

Neither Amperes 4 nor ServerKeep shows ads.

### Which is updated more often, Amperes 4 or ServerKeep?

Amperes 4 ships an update every 2 months, and ServerKeep every 2 months. Most recently, Amperes 4 was updated on November 1, 2026 and ServerKeep on October 28, 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.*