Comparison

A4Calc vs KubeGrip

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

Head to head
About

A4Calc

Features
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A4 Small Format Interchangeable Core Calculator (sister app of A2Calc and A3Calc) ---Programmed by a Locksmith, for Locksmiths--- Automatically calculates the pinning chart for A4 SFIC. Built for 6 or 7 pin systems, however, less can be achieved by using a decimal to erase a chamber. Minimum of a control and master key are required to make a chart. Additional change key available for all devices; 2 change keys available for 16:9 screen devices. Randomize function will generate completely random charts each time it is triggered. "Lock/Unlock" toggle disables/enables all inputs and functions to prevent unwanted/lost changes. Control Finder is an added bonus by reverse engineering a core to determine the control key's bitting. This is perfect when needing to remove multiple cores in a building when the control key has been lost. There are two methods for achieving the control key: 1. using the master, control, and bottom pins, or 2. using only the top/driver pins. Up to 16 different projects can be saved at any one given time. All projects are encrypted and protected with a passcode when stored on your device. All projects can be exported via AirPrint and Email. Compatibility: iPhone / iPod touch on iOS 8.0 or later and iPad on iOS 12.0 or later. Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com

About

KubeGrip

Features
Read full description

Take control of your Kubernetes clusters from anywhere with KubeGrip, the native iOS client designed for speed, simplicity, and complete personal control. Whether you're a HomeLab enthusiast running a K3s cluster, a DevOps engineer troubleshooting production services on the go, or a developer experimenting with configurations, KubeGrip puts a powerful, responsive cluster control center right on your iPhone. Core Features: • Cluster Overview & Health Insights: • Get an instant overview of your cluster's health, including node readiness, CPU and memory allocation requests/limits, and storage capacity. • Cluster Issues detector: quickly spot failing pods, crash-looping workloads, and cluster anomalies with one tap. • Pod Diagnostics & Interactive Terminal: • Stream and search real-time container logs with multi-container support. • Launch interactive shell sessions directly from your device (Pod Exec / Terminal). • Inspect historical CPU and memory utilization trends with native iOS Charts. • Examine pod events, conditions, YAML specifications, and associated resources. • Workload Control & Fast Actions: • Rollout restart for Deployments, StatefulSets, and DaemonSets with a safe confirmation step. • Scale replicas up or down instantly. • Trigger immediate runs (Run Now), suspend, or resume CronJobs on demand. • Delete and manage resources safely with built-in guardrails. • Helm & Custom Resources (CRDs): • Browse installed Helm releases and inspect release status, revisions, and details. • Explore Custom Resource Definitions (CRDs) and inspect custom resource objects effortlessly. • Comprehensive Resource Coverage: • Complete visibility across Namespaces, Nodes, Workloads, Networking (Services, Ingress, Endpoints), Storage (PV, PVC, StorageClass), Configs (ConfigMaps, Secrets), and RBAC (Roles, Bindings, ServiceAccounts). • Cordon and uncordon nodes directly to manage workload scheduling. • HomeLab Friendly & Zero Friction: • Built-in interactive Demo Cluster: test drive KubeGrip immediately without any setup. • HomeLab connection guides and network diagnosis tailored for Tailscale, LAN, and K3s setups. • Seamless kubeconfig import via QR code, files, or clipboard, with credentials securely encrypted in Apple Keychain. • Pure Native iOS Experience: • Lightning-fast search and filtering across all resource lists. • Built with SwiftUI: fluid animations, full Dark Mode support, and English & Chinese localization.

Screenshots

A4Calc4 screens
KubeGrip4 screens

Verdict

The call

The clearest difference is price: KubeGrip at Free against A4Calc's $4.99. KubeGrip also leads on update cadence (every 3 weeks vs every 8 months). A4Calc's advantage is iOS requirement (12.0 vs 17.6). On ads, in-app purchases and device support 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

KubeGrip is free to download; A4Calc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

A4Calc ships an update every 8 months, KubeGrip every 3 weeks. The most recent releases landed on September 30, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 3 level
A4Calc versus KubeGrip: the parameters behind the verdict, then further details
ParameterA4CalcKubeGrip
Price$4.99Free — better
Update frequencyEvery 8 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better17.6
Further details — not scored
Size2 MB25 MB
Age rating4+4+
DeveloperFarren Domenici骏 胡

In-app purchases

None

A4Calc

No in-app purchases

None

KubeGrip

No in-app purchases

Questions

Is A4Calc free?
A4Calc costs $4.99, with no in-app purchases.
Is KubeGrip free?
KubeGrip is free to download, with no in-app purchases.
Do A4Calc or KubeGrip have ads?
Neither A4Calc nor KubeGrip shows ads.
Which is updated more often, A4Calc or KubeGrip?
A4Calc ships an update every 8 months, and KubeGrip every 3 weeks. Most recently, A4Calc was updated on September 30, 2026 and KubeGrip on October 7, 2026.

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