Kmap vs Voltius
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kmap
Simplify Boolean expressions and create Karnaugh maps for up to six variables. Offers both Sum of Products and Product of Sums, with support for 'don't-care' conditions and step-by-step solution viewing. Ideal for students and engineers in digital logic and computer engineering.
- Karnaugh map creation (2-6 variables)
- Automatic Boolean minimization
- Sum of Products (SOP) and Product of Sums (POS)
- Don't-care (X) support
- Truth table input
- Color-coded grouping overlays
- Step-by-step solution view
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Kmap helps students and engineers simplify Boolean expressions quickly and clearly. Create and solve 2 to 6 variable Karnaugh maps with automatic minimization and a clean, fast interface. Features: Sum of Products (SOP) and Product of Sums (POS) Don't-care (X) support Direct K-map input Truth table input Color-coded grouping overlays Step-by-step solution view Light and dark appearance Ideal for digital logic, computer engineering, and Boolean algebra coursework.
Voltius
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Voltius supports electrical conductor sizing using selected tables and criteria from the Brazilian NBR 5410 standard. It is intended for engineers, electricians and technicians working with low-voltage electrical installations. FEATURES • Installation methods A1, A2, B1, B2, C, D, E, F and G, with simplified selection for A and B. • Copper and aluminum conductors; PVC 70°C and EPR/XLPE 90°C insulation. • Ampacity-based conductor size preview. • Voltage-drop calculation when voltage and length are provided, with an option to recalculate conductor size. • Temperature and grouping correction factors. • Layers and parallel conductors for supported combinations, with messages when a specific engineering assessment is required. • Neutral conductor cross-section display. • Light and dark themes. • Interface available in Portuguese, English and Spanish. REFERENCE AND SCOPE NBR 5410:2004, corrected version 2008 — Low-voltage electrical installations. This app does not replace consultation of the official standard or assessment of a complete installation. The current-only preview does not check voltage drop. Results must be validated by a qualified professional. CALCULATION REPORT Export a PDF with inputs, formulas, calculation steps and assumptions. Compare sizing by current-carrying capacity, resistance-only voltage-drop resizing and resizing with estimated reactance. Set power factor, inductive or capacitive load and 50 or 60 Hz frequency in advanced parameters. The model uses resistance corrected for the assumed conductor temperature and approximate reactance. It does not verify actual cable temperature or current balance between parallel conductors; cases requiring these checks remain identified as unvalidated previews.
Screenshots
Verdict
The clearest difference is update cadence: Voltius at every 3 weeks against Kmap's every 128 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Kmap ships an update every 128 months, Voltius every 3 weeks. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.
| Parameter | Kmap | Voltius |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 128 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Michalka | Caio Pinheiro |
In-app purchases
Kmap
No in-app purchases
Voltius
No in-app purchases









