Comparison

Amperes 4 vs ServerKeep

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Amperes 4

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
Currently charting
Read full description

Take Control of Your Power with Amperes 4 Stop guessing why your phone is charging slowly. Amperes 4 is the ultimate diagnostic tool designed to help you test your charging setup, identify faulty hardware, and monitor your device's health with professional-grade precision. Key Features Battery Charging Rates: Get the mA and wattage data to see exactly how much juice is flowing into your battery. Hardware Comparisons: Side-by-side testing for wired vs. wireless chargers, power banks, and different cable types. Deep Data & Graphs: Visualize your charging sessions with detailed, interactive graphs that track performance over time. Global Benchmarking: Compare your charging speeds with other users online to see if your gear is performing at its peak. Intelligent Battery Alarm: Get notified the moment your battery reaches your desired level to help prolong its lifespan. System Vital Monitoring: Track thermal status, memory usage, and disk space alongside your battery metrics. Professional Testing Tools Customized Logging: Add notes about wire brands or charger models to your tests for future reference. Color-Coded Results: Intuitive UI instantly shows you if a charger is "Good," "Average," or "Bad." Exportable Data: Need the raw numbers? Export your test results for external analysis or record-keeping. Why Amperes 4? Whether you are testing a brand-new GaN charger, verifying a "fast-charging" cable, or troubleshooting a power bank, Amperes 4 gives you the transparency you need to keep your devices running efficiently. Stop wasting time with bad cables. Get the data. Get Amperes 4.

About

ServerKeep

Features
Read full description

**Your servers, in your pocket.** ServerKeep gives you real-time visibility into your Linux servers and full control over your Docker containers — all from your iPhone or iPad. No daemons to install, no cloud services to sign up for, no agents running on your machines. ServerKeep connects directly over SSH using credentials stored securely in your device's Keychain. **Server Monitoring** Add your servers and instantly see what matters. ServerKeep pulls live system stats including CPU usage, memory breakdown, disk I/O, network throughput, and TCP health — presented through clean, purpose-built gauges and charts. See which servers are online at a glance, drill into detailed breakdowns, and keep tabs on temperature and uptime. **Memory Insights** Go beyond simple "used vs. free" numbers. ServerKeep breaks memory down into used, page cache, and available — with visual progress bars and a segmented ring chart — so you can tell at a glance whether your server is actually under pressure or just caching aggressively. **Docker Container Management** View all running containers across your servers. Start, stop, and restart containers with a tap. Inspect port mappings, health status, and container images. View and save Docker Compose configurations directly from the app. **Docker Compose Support** Organise your containers into Compose pods. See pod status, manage the full lifecycle, and keep your stack definitions accessible wherever you are. **Built-in Terminal** Need to run a quick command or debug something hands-on? ServerKeep includes a fully interactive SSH terminal with PTY support. No need to switch to a separate app. **Saved Snippets** Save frequently used commands as snippets and run them on any server with a single tap. Perfect for common maintenance tasks, health checks, or deployment scripts you run regularly. **Designed for Privacy** ServerKeep never phones home. Your server credentials are stored exclusively in the iOS Keychain on your device. All connections go directly from your device to your servers. There are no analytics, no tracking, and no third-party services involved. **Built Natively for iOS** ServerKeep is built entirely with SwiftUI and takes full advantage of the platform — smooth animations, native controls, and an interface that feels right at home on your device.

Screenshots

Amperes 44 screens
ServerKeep4 screens

Verdict

The call

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 (#157 vs unranked). On update cadence, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard4 real differences · 7 level
Amperes 4 versus ServerKeep: the parameters behind the verdict, then further details
ParameterAmperes 4ServerKeep
Price$2.99Free — better
Rating4.4 (652 ratings) — better—
Positive reviews46.7% of reviews—
Number of ratings652 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
Best chart rank#157 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS17.0 — better17.6
Further details — not scored
Size36 MB8 MB
Age rating4+4+
DeveloperCrioSoft LLCDesmond Kramer

Bugs and requests

Amperes 4

Reported bugs

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

Requested features

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

ServerKeep

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Amperes 4

No in-app purchases

1 purchases

ServerKeep

One-time1
  • Server Monitor - ServerKeep$9.99

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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