Radar Plotting vs Logarithmic Scale
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Radar Plotting
This app offers advanced radar plotting for maritime navigation. It allows users to calculate critical encounter data, plan maneuvers, and analyze complex scenarios with interactive visualizations. Designed for training and decision support, it aids in understanding vessel interactions.
- Kinematic calculations (CPA/TCPA, aspect)
- True and relative speed estimation
- Evasive maneuver planning with COLREG guidance
- Rescue and escape scenario planning
- Double-target analysis
- Current and drift estimation
- Interactive radar canvas with playback
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Radar Plotting provides advanced radar-plotting capabilities for iPhone and iPad. Compute CPA/TCPA, estimate true motion, plan evasive/rescue/escape manoeuvres, and analyse two-target encounters — all visualised on an interactive radar sheet. Highlights: - Precise kinematic calculations (CPA/TCPA, aspect, true & relative speed) - Evasive manoeuvres with COLREG guidance - Rescue & escape planning, including scenarios with faster vessels - Double-target handling - Current/drift estimation - Interactive canvas with adjustable scales and animated trajectory playback - Import/export via QR code and PDF report generation Safety note: This app is for training and decision support. It does not replace certified navigational equipment or official procedures. Always follow COLREG and local/company rules.
Logarithmic Scale
Calculate travel time based on distance and average speed. Ideal for calculating estimated arrival times for mechanical ships.
- Passage time calculations
- ETA estimation
- Speed and distance input
- Mechanical ship focus
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This app may be for easy calculations of passage time with known average speed. It's good for sailing of mechanical ships to calculate passage time for final ETA.
Screenshots
Verdict
Radar Plotting and Logarithmic Scale both sit at 5.0 stars, but that hides the real split: 100% of Logarithmic Scale's written reviews are positive against 50% of Radar Plotting's. Logarithmic Scale also leads on price (Free vs $7.99) and update cadence (every 8 days vs every 5 months). Radar Plotting's advantage is in-app purchases (none vs 1) and device support. On rating and iOS requirement 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
Logarithmic Scale is free to download; Radar Plotting costs $7.99 up front. Logarithmic Scale sells 1 one-off in-app purchase. Radar Plotting asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Radar Plotting against 5.0 for Logarithmic Scale. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews are what separate them: 50% of Radar Plotting's written reviews are positive against 100% of Logarithmic Scale's.
Radar Plotting ships an update every 5 months, Logarithmic Scale every 8 days. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.
| Parameter | Radar Plotting | Logarithmic Scale |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 5.0 (1 ratings) | 5.0 (4 ratings) |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 4 — better |
| Update frequency | Every 5 months | Every 8 days — better |
| Ads | No | — |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | — |
| Requires iOS | 15.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 17 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Giacomo Gabriele | GEORGII BABUKHADIIA |
Customer experience
Radar Plotting
Logarithmic Scale
In-app purchases
Radar Plotting
No in-app purchases
Logarithmic Scale
- Remove Ads$0.99
