Comp 2.0 vs My Build Vault
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Comp 2.0
Enhance your 1998.5-2002 24V Cummins diesel engine's performance with on-the-fly adjustments. Fine-tune fueling, accelerator pedal response, and timing for significant power gains.
- On-the-fly adjustability via Bluetooth
- Fine-tune low boost fueling
- Adjust fuel delivery based on pedal position
- Optimize timing for power curves
- Gains of 40-150 HP and 150-380 TQ
- Supports aftermarket injectors and turbos
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The COMP box has dominated the 1998.5-2002 24V Cummins market for two decades and put Edge Products on the map in the early diesel performance era. With so many VP44 trucks still on the road, we’ve revamped our COMP to offer dominating performance gains with the industry’s latest technology. Our all-new Bluetooth wireless switch offers on-the-fly adjustability giving complete control over the driving experience. The mobile App offers fine tuning adjustment for low boost fueling, fuel delivery based on Accelerator Pedal Position, and timing to dial in your power curve for aftermarket injectors and larger turbo combinations. Breathing new life into your 5.9L Cummins, COMP offers gains from 40-150 HP, 150-380 TQ, even more RPM, and power available for heavily modified applications.
My Build Vault
This app helps car enthusiasts meticulously track vehicle modifications, performance data, and important documents. It allows users to log parts, costs, and installation details, monitor performance metrics, and store vehicle-related paperwork. Features include AI invoice scanning and VIN decoding for comprehensive build management.
- Track modifications across 7 categories
- Log performance metrics like dyno runs and acceleration
- Store and manage vehicle documents with expiry alerts
- Generate professional build sheets for various purposes
- AI-powered invoice scanning for automatic data extraction
- VIN decoder for factory specifications
- Fleet management for multiple vehicles
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Build Vault is the ultimate vehicle modification tracker for car enthusiasts, builders, and collectors. Document every detail of your build — from bolt-ons to full engine swaps — with photos, costs, vendor info, and installation details all in one place. TRACK YOUR MODIFICATIONS Log every mod across 7 categories: Engine, Suspension, Wheels, Brakes, Drivetrain, Interior, and Exterior. Record part names, brands, part numbers, purchase price, labor cost, vendor, installation date, and status. Attach before and after photos to see your build evolve. PERFORMANCE LOGGING Record dyno runs with horsepower and torque numbers. Log quarter-mile times, 0-60 runs, trap speeds, boost levels, and corner weights. Track how each modification impacts your build's performance over time. DOCUMENT VAULT Store registration, title, insurance, invoices, receipts, warranties, service records, and inspection documents. Multi-page scanning, expiration date tracking, and automatic alerts when documents are about to expire so you never miss a renewal. MILEAGE TRACKING Log odometer readings over time with visual charts. See mileage at each modification install and performance test for a complete build timeline. BUILD SHEET EXPORT Generate professional build sheets in four templates — Sale, Insurance, Car Show, and Minimal. Export as PDF, CSV, or JSON. Perfect for selling your vehicle, filing insurance claims, or displaying at car shows. BUILD MILESTONES Track your build stages from stock to fully built. Set milestones, mark them complete, and document your progression from Stage 1 to Stage 3 and beyond. FLEET INSIGHTS Own multiple vehicles? See total investment, combined horsepower, category spending breakdowns, and fleet leader rankings — most powerful, lightest, best power-to-weight ratio, and more. AI INVOICE SCANNER (PRO) Snap a photo of any parts invoice or receipt. AI automatically extracts item names, prices, part numbers, and labor costs, then categorizes them for one-tap import into your mod list. VIN DECODER Enter your VIN to automatically pull factory specs — stock horsepower, torque, curb weight, drivetrain, transmission, engine code, and chassis code from the NHTSA database. CLOUD SYNC (PRO) Keep your builds synced across all your Apple devices with iCloud. Your data is always backed up and accessible wherever you are. FREE TO USE Build Vault is free with up to 1 vehicle, 15 mods, 20 documents, and 2 build sheet exports per month. Upgrade to Build Vault Pro for unlimited everything, cloud sync, AI invoice scanning, and full VIN decode. BUILD VAULT PRO — $29.99/year • Unlimited vehicles, mods, and photos • Unlimited documents and build sheet exports • AI-powered invoice scanning • iCloud sync across devices • Full VIN decode with factory specs Terms of Use: https://mybuildvault.com/terms/ Privacy Policy: https://mybuildvault.com/privacy/
Screenshots
Verdict
The clearest difference is rating: My Build Vault at 5.0 against Comp 2.0's 3.8. My Build Vault also leads on update cadence (every 2 months vs every 11 months). Comp 2.0's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price 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. My Build Vault sells 1 in-app purchase, starting at $19.99 per year. Comp 2.0 asks for nothing beyond the download.
My Build Vault holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Comp 2.0 has 6 ratings behind it against 1, so its average is the more settled of the two.
Comp 2.0 ships an update every 11 months, My Build Vault every 2 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Comp 2.0 | My Build Vault |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (6 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 11 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 139 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Holley Performance Products | Tim Eberhard |
Customer experience
Comp 2.0
My Build Vault
In-app purchases
Comp 2.0
No in-app purchases
My Build Vault
- My Build Vault Pro$19.991 Year









