iGradient vs RF Engineer's Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iGradient
This app uses your device's sensors to accurately measure any 2D angle. It intelligently detects orientation and provides readings in degrees, radians, or as a gradient. Ideal for various practical applications requiring precise angle measurements.
- Measures 2D angles
- Intelligent orientation detection
- Reads in degrees, radians, or gradient
- Accurate to 1 degree
- Switches between horizontal/vertical axis
- Holds measurement
- No calibration needed
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With iGradient you can use your iPhone, iPad or iPod Touch to find any 2D angle. No need to tell the iPhone what angle you want, iGradient knows which way you’re holding your device and finds it. It’s a no mess, no fuss tool; great for engineering, landscaping, DIY, you name it! Features: - Simple to use - Intelligently detects if you want to find an angle in portrait or landscape - Measures angle in degrees, radians or as a gradient - Accurate to 1 degree - Switches between measuring the angle from the horizontal or vertical axis - Holds the measurement for easy reading - No calibration required - Can email your reading
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...
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Verdict
The clearest difference is price: RF Engineer's Calc at Free against iGradient's $2.99. iGradient's advantage is device support (3 vs 1) and iOS requirement (9.3 vs 16.1). On update cadence, 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
RF Engineer's Calc is free to download; iGradient costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iGradient ships an update every 6 months, RF Engineer's Calc every 10 months. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.
| Parameter | iGradient | RF Engineer's Calc |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.3 (7 ratings) — better | — |
| Positive reviews | 93.5% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 6 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.3 — better | 16.1 |
| Further details — not scored | ||
| Size | 10 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Ivan Perre | GRAHAM JOHN SMITH |
In-app purchases
iGradient
No in-app purchases
RF Engineer's Calc
No in-app purchases
Questions
Is iGradient free?
Is RF Engineer's Calc free?
Do iGradient or RF Engineer's Calc have ads?
Which is updated more often, iGradient or RF Engineer's Calc?
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