KeyHub vs RF Engineer's Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KeyHub
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KeyHub helps teams manage keys better. A KeyHub represents a physical key cabinet. Simply add your keys to KeyHub and assign them to hook numbers. When a key is required, check it out on the app so your team knows who has taken the key and when. Daily summary emails are sent to the KeyHub Manager and, when a key is due back, reminder emails are sent to people that have checked out a key. Keys can have useful notes and a log of all key access is securely stored. KeyHub helps you keep your key inventory up to date and accurate.
RF Engineer's Calc
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A simple RF Engineer's Calculator. Convert Watts to dBm, calculate dBm power changes, convert Return Loss to VSWR, etc...
Screenshots
Verdict
The clearest difference is update cadence: KeyHub at weekly against RF Engineer's Calc's every 10 months. KeyHub also leads on device support (3 vs 1) and iOS requirement (12.1 vs 16.1). On price, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
KeyHub ships an update weekly, RF Engineer's Calc every 10 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.
| Parameter | KeyHub | RF Engineer's Calc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.1 — better | 16.1 |
| Further details — not scored | ||
| Size | 17 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Gversion Ltd | GRAHAM JOHN SMITH |
In-app purchases
KeyHub
No in-app purchases
RF Engineer's Calc
No in-app purchases
