Comparison

VistaCCD vs VimKey

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

VimKey

Enhance your mobile editing experience with Vim-style navigation and dedicated arrow keys. This app offers precise cursor control for developers and power users on iOS devices, bringing desktop-level efficiency to your fingertips.

Highlights
  • Vim-style HJKL navigation
  • Dedicated directional arrow keys
  • Dual layout switching
  • Privacy-focused data handling
  • Haptic feedback and click sounds
Features
Read full description

【Master Your Cursor on iOS】 As a developer, I was frustrated with editing code and managing SSH sessions on my iPhone. The native "magnifying glass" cursor is slow, and my fingers often blocked the text I was trying to select. I built VimKey to scratch my own itch. It brings the precision of desktop editing to your mobile device. Key Features: * Vim-Style Navigation: Use the legendary HJKL (←↓↑→) keys to move the cursor. Keep your hands on the keyboard and fly through text. * Dedicated Arrow Keys: Includes a standard directional pad for precise control without blocking the screen. * Dual Layouts: Seamlessly switch between the navigation layout and a standard QWERTY keyboard (Unlock QWERTY for 30 minutes by watching a short ad, or unlock forever with a one-time purchase). * Privacy First: We respect your data. "Full Access" is requested ONLY to provide haptic feedback and click sounds. We strictly do NOT collect, store, or transmit your keystrokes. Important Note: * Due to browser limitations on iOS, special keys (Esc, Tab, Ctrl) and arrow keys do NOT work in browser-based WebSSH clients. For the best experience, please use a native Terminal app. Contact: I'm actively improving this app based on user feedback. Email: mozhenbear@zodic.dev

Screenshots

VistaCCD4 screens
VimKey3 screens

Verdict

The call

The clearest difference is in-app purchases: VistaCCD at none against VimKey's 1. VistaCCD also leads on review sentiment (100% vs 67%) and iOS requirement (8.0 vs 15.6). VimKey's advantage is update cadence (every 3 days vs fortnightly). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. VimKey sells 1 one-off in-app purchase. VistaCCD asks for nothing beyond the download.

UpkeepUpdate frequency

VistaCCD ships an update fortnightly, VimKey every 3 days. The most recent releases landed on September 29, 2026 and October 16, 2026 respectively.

Scorecard5 real differences · 5 level
VistaCCD versus VimKey: the parameters behind the verdict, then further details
ParameterVistaCCDVimKey
PriceFreeFree
Rating—3.4 (5 ratings) — better
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings—5 — better
Update frequencyFortnightlyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better15.6
Further details — not scored
Size7 MB5 MB
Age rating4+4+
DeveloperKal Designs Ltdchuncheng su

Customer experience

VistaCCD

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

VimKey

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

VistaCCD

No in-app purchases

1 purchases

VimKey

One-time1
  • qwert Layout$2.99

Questions

Is VistaCCD free?
VistaCCD is free to download, with no in-app purchases.
Is VimKey free?
VimKey is free to download, with in-app purchases available.
Do VistaCCD or VimKey have ads?
Neither VistaCCD nor VimKey shows ads.
Which is updated more often, VistaCCD or VimKey?
VistaCCD ships an update fortnightly, and VimKey every 3 days. Most recently, VistaCCD was updated on September 29, 2026 and VimKey on October 16, 2026.

Other comparisons