Comparison

NK vs CDI

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

Head to head
About

NK

Features
Read full description

**Function Application** - Easy install - Real-Time Tuning - Anti-Theft - 3 Mode - Calibration - Injector Tuning (-50 to 50) % - Ignition Tuning(-50 to 20) DEG - Idle Ramble - Compensate Tuning - Analyze - TPS Enrichment Tuning - Fuel start Tuning - Digital I/O - Data Log - BARO compensate

About

CDI

Features
Read full description

Unlock Full Performance Take Full Control! Enhance your engine’s performance with easy tuning at your fingertips. Key Features: 1. Ignition Timing Adjustment – Fine-tune ignition timing for maximum torque and power. 2. Rev Limit Adjustment – Set the engine's rev limit to unlock its full potential. 3. Mode Switching – Easily switch between driving modes for optimal performance. 4. Quick Shift – Faster gear shifts, reduced lag, and improved acceleration. 5. Hold/Reset Max Speed – Record and reset your top speed effortlessly. 6. Logging Function – Monitor real-time engine performance data. 7. Load/Save File Tune – Save and load tuning files instantly. 8. Launch Control – Optimize launch settings for powerful, wheel-spin-free acceleration. User-friendly – Suitable for both beginners and pro tuners! Download now and unleash your engine’s true potential!

Screenshots

NK3 screens
CDI4 screens

Verdict

The call

The clearest difference is price: CDI at Free against NK's $9.99. CDI also leads on ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

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

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

CDI is free to download; NK costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NK ships an update every 3 months, CDI every 2 months. The most recent releases landed on August 28, 2026 and September 22, 2026 respectively.

Scorecard2 real differences Β· 4 level
NK versus CDI: the parameters behind the verdict, then further details
ParameterNKCDI
Price$9.99Free β€” better
Update frequencyEvery 3 monthsEvery 2 months β€” better
AdsYesNo β€” better
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS12.0 β€” better13.0
Further details β€” not scored
Size80 MB29 MB
Age rating4+17+
DeveloperNK RACING PARTS COMPANY LIMITEDECU=SHOP

In-app purchases

None

NK

No in-app purchases

None

CDI

No in-app purchases

Questions

Is NK free?
NK costs $9.99, with no in-app purchases.
Is CDI free?
CDI is free to download, with no in-app purchases.
Do NK or CDI have ads?
NK shows ads; CDI does not.
Which is updated more often, NK or CDI?
NK ships an update every 3 months, and CDI every 2 months. Most recently, NK was updated on August 28, 2026 and CDI on September 22, 2026.

Other comparisons