BPaaS Image Ruler vs Sigmakey
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BPaaS Image Ruler
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Measure Pixels with Precision BPaaS Image Ruler is a lightweight pixel inspection tool designed for developers, designers, and technical users who need accurate image measurements. Key Features • X/Y pixel rulers with real coordinate readout • Adaptive grid with major and minor divisions • Zoom up to 80× for detailed inspection • Pinch-to-zoom and pan gestures • Toggle rulers and grid overlays • Import images from Photos • Paste images directly from clipboard All processing happens locally on your device. No data is collected or transmitted. BPaaS Image Ruler is ideal for UI inspection, layout validation, design verification, and pixel-perfect measurements.
Sigmakey
This utility provides a specialized keyboard for typing mathematical expressions, including fractions, roots, and Greek letters, directly within any app. It supports LaTeX, Unicode, and image output, with on-device processing for privacy and speed.
- Full math keyboard layout
- Two-dimensional cursor for exponents/numerators
- Type LaTeX, Unicode, or rendered image
- On-device typesetting, no network required
- Symbol search, recent, and favorite symbols
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Sigmakey is a math keyboard for people who need to type actual math, anywhere you can type at all. Fractions, exponents, roots, Greek letters, and matrices sit one tap away, and the cursor moves right into a numerator or an exponent, so scientific notation looks the way it should. - A full math keyboard layout that works in any app with a text field - A two-dimensional field with a cursor that steps into fractions and powers - Type LaTeX, plain Unicode, or a rendered image, whichever the app expects - Everything typeset on device, with no network - Search for a symbol, or grab a recent or a favorite Drop an equation into a note, a message, or a homework app without hunting through menus. Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: BPaaS Image Ruler at none against Sigmakey's 1. BPaaS Image Ruler also leads on iOS requirement (17.2 vs 26.0). On price, ads 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
Both are free to download. Sigmakey sells 1 one-off in-app purchase. BPaaS Image Ruler asks for nothing beyond the download.
| Parameter | BPaaS Image Ruler | Sigmakey |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.2 — better | 26.0 |
| Further details — not scored | ||
| Size | 13 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Jose A Perez | Andrii Bashta |
In-app purchases
BPaaS Image Ruler
No in-app purchases
Sigmakey
- Sigmakey Pro$9.99









