Comparison

VistaCCD vs RaceBuddy Overlay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

VistaCCD

This utility app assists engineers in the preliminary design of turbo compressor impellers. It calculates key dimensions and efficiency based on user-defined performance targets and inlet conditions, offering visual feedback for optimization.

Highlights
  • Preliminary turbo compressor impeller design
  • Key dimensions and efficiency calculation
  • Meanline design calculation
  • Reynolds number and tip clearance correction
  • Visual feedback for optimization
  • 2D impeller sketch
Features
Read full description

PCA Engineers brings preliminary design of turbo compressor impellers to your fingertips. VistaCCD gives users the key dimensions and achievable efficiency for any turbo compressor stage operating with perfect gas. Taking as constraints the target design point performance and gas inlet conditions, VistaCCD performs a meanline design calculation using well-validated empirical relationships for work factor and achievable efficiency, corrected for Reynolds number and tip clearance effects. The user can vary input parameters to optimise performance within specific dimensional constraints, guided by the visual feedback from the efficiency correlation and the 2D sketch of the impeller. This app will certainly be of interest to engineers involved in developing new compressor designs. Equally it will be relevant to those applying turbo compressors to turbochargers, industrial compressors and small gas turbines, giving users a better appreciation of the impact of design constraints.

About

RaceBuddy Overlay

Features
Read full description

Turn your track day data into broadcast-quality video overlays, detailed lap analysis, and shareable car cards — all from your iPhone. RB Overlay is built for track day enthusiasts, amateur racers, and motorsport content creators who want more from their telemetry data. Import files from the logger you already use, analyze your performance, and create professional video overlays — no desktop software required. IMPORT ANY TELEMETRY FORMAT RB Overlay reads more formats than any other mobile app: • VBO (RaceBox) • RNZ (RaceNavigator) • RCZ (RaceChrono) • CSV (universal, with auto-detection for RaceBox, Race Render, Serious Racing, FASTLAP, and custom layouts) • MoTeC LD (binary, reverse-engineered) • ECUMaster EMU Black (.emublog) • F1 official session data via API Just open the file — RB Overlay handles the rest. ANALYZE EVERY LAP Get a complete picture of every session: • Automatic lap detection from GPS data • Sector splits with colour-coded deltas • Best lap and ideal lap calculation • Speed traces, G-force graphs, and altitude profiles • Lap-to-lap comparison with overlaid telemetry charts • Interactive track map with live car position • Save and compare laps across sessions DRAG RUN ANALYSIS Measure acceleration performance with precision: • Automatic drag run detection • Speed-to-speed times (0-60, 60-120, etc.) • Distance-based metrics (0-100m, 0-200m) • Altitude and slope compensation • Satellite signal quality tracking CREATE VIDEO OVERLAYS Export professional video with real-time telemetry data: • Green screen mode — generate a pure overlay to composite in any editor • Video overlay mode — apply telemetry directly onto your onboard footage • Full custom layout designer — drag and drop gauges, maps, timers, and stats • Speed gauge, G-force meter, lap timer, circuit map, sector times, and more • Pre-built layouts for circuit and drag sessions • Export in 1080p, 2K, or 4K resolution • Portrait mode for Instagram Stories and Reels • Audio passthrough from source video CREATE CAR CARDS Design shareable photo cards for social media: • Import any photo from your camera roll • Overlay your best lap, sector times, track name, and date • Export in Story (9:16), Post (1:1), or Landscape (16:9) format • Perfect for Instagram, Twitter, and racing communities BROWSE F1 DATA Explore official Formula 1 session data: • Browse seasons from 2000 to present • View race, qualifying, and practice sessions • Access lap times for every driver • Study real F1 telemetry including RPM, gear, throttle, brake, and DRS • Overlay F1 data with the same tools you use for your own sessions 500+ TRACKS BUILT IN • Automatic circuit detection within 3km • Cloud-synced track database • Create custom track definitions for private circuits FREE TO USE — PRO TO GO FURTHER RB Overlay is free to download with full support for VBO, RNZ, RCZ, and CSV import, basic analysis, and green screen export at 1080p. Upgrade to Pro for: • 2K and 4K video export • Portrait video export • Video overlay on your own footage • Lap comparison tools • Custom layout designer • MoTeC LD and EMU Black import • Watermark removal Whether you are reviewing your latest track day, building content for your racing channel, or just exploring F1 data — RB Overlay gives you the tools that used to require a desktop and expensive software, right on your phone. Download RB Overlay and turn raw data into something worth sharing. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

VistaCCD4 screens
RaceBuddy Overlay4 screens

Verdict

The call

The clearest difference is in-app purchases: VistaCCD at none against RaceBuddy Overlay's 3. VistaCCD also leads on update cadence (fortnightly vs every 5 months) and iOS requirement (8.0 vs 26.2). On price, ads and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. RaceBuddy Overlay sells 3 in-app purchases, starting at $1.99 per month. VistaCCD asks for nothing beyond the download.

UpkeepUpdate frequency

VistaCCD ships an update fortnightly, RaceBuddy Overlay every 5 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Ā· 5 level
VistaCCD versus RaceBuddy Overlay: the parameters behind the verdict, then further details
ParameterVistaCCDRaceBuddy Overlay
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyFortnightly — betterEvery 5 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS8.0 — better26.2
Further details — not scored
Size7 MB37 MB
Age rating4+4+
DeveloperKal Designs LtdImperio

In-app purchases

None

VistaCCD

No in-app purchases

3 purchases

RaceBuddy Overlay

Subscriptions2
  • Monthly PRO$1.991 Month
  • Yearly$9.991 Year
One-time1
  • Lifetime$19.99

Questions

Is VistaCCD free?
VistaCCD is free to download, with no in-app purchases.
Is RaceBuddy Overlay free?
RaceBuddy Overlay is free to download, with in-app purchases available.
Do VistaCCD or RaceBuddy Overlay have ads?
Neither VistaCCD nor RaceBuddy Overlay shows ads.
Which is updated more often, VistaCCD or RaceBuddy Overlay?
VistaCCD ships an update fortnightly, and RaceBuddy Overlay every 5 months. Most recently, VistaCCD was updated on November 1, 2026 and RaceBuddy Overlay on October 31, 2026.

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