Comparison

Noise Patrol App vs Crypto String

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

Head to head
About

Noise Patrol App

Features
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Noise Patrol The definitive measurement solution for stationary exhaust noise testing Noise Patrol provides an all-in-one, easy-to-use system designed for automatic measurement of exterior exhaust noise from road vehicles under stationary conditions, including simultaneous, fully integrated RPM detection. The system supports various other RPM detection solutions as required by local legislation or preference (AVL, OBDII direct interface, …). Measurements are performed completely according to ISO 5130 standard and SLM is IEC61672 Class 1 compliant. Adaptation to local legislations or directives is possible and can also be locked so that only a master user can perform these changes. Capabilities: - Exterior exhaust noise level measurement of motorcycles, cars, trucks and mopeds under stationary conditions (engine sweep test) with integrated RPM measurement control Uses: - Real‐world, on‐site testing: Vehicle noise inspectors and police officers - Exhaust R&D and production testing: Integrating in the development or production test process for motor vehicle exhaust systems - Car, motorcycle or truck production line testing: Performing final checks prior to customer delivery

About

Crypto String

Features
Read full description

Crypto String is the ultimate secure text encryption app using military-grade AES-256-GCM with authentication. Protect your sensitive information with powerful encryption and Base64 encoding β€” all 100% offline and private. Core Features β€’ AES-256-GCM Encryption – Military-grade algorithm with custom keys for unique results β€’ Base64 Encode/Decode – Fast and reliable for data transmission and storage β€’ File Import – Directly import text/keys from local files or iCloud Drive β€’ Smart Key Management – Import keys + eye-icon toggle to view/hide safely β€’ History Records – Auto-save last 10 operations with key hints (only first 4 chars) β€’ Multilingual Interface – Automatic language switching β€’ Dark Mode + iOS Native – Built with Apple CryptoKit for maximum security Security First β€’ 100% Local Processing – Nothing uploaded to cloud β€’ No data collection, no accounts, no tracking β€’ Keys never stored in plain text β€’ One-time purchase, no ads, no subscriptions Perfect for protecting passwords, notes, private messages, or business data. Simple, fast, and truly private. Download Crypto String now and encrypt with confidence!

Screenshots

Noise Patrol App4 screens
Crypto String3 screens

Verdict

The call

The clearest difference is price: Noise Patrol App at Free against Crypto String's $0.99. Noise Patrol App also leads on iOS requirement (15.6 vs 18.0). On update cadence, ads, in-app purchases and device support 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

Noise Patrol App is free to download; Crypto String costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Noise Patrol App ships an update every 5 months, Crypto String every 4 months. The most recent releases landed on September 9, 2026 and September 19, 2026 respectively.

Scorecard2 real differences Β· 4 level
Noise Patrol App versus Crypto String: the parameters behind the verdict, then further details
ParameterNoise Patrol AppCrypto String
PriceFree β€” better$0.99
Update frequencyEvery 5 monthsEvery 4 months β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 β€” better18.0
Further details β€” not scored
Size23 MB0 MB
Age rating4+4+
DeveloperIMS Merilni sistemi d.o.o.Xu Wang

In-app purchases

None

Noise Patrol App

No in-app purchases

None

Crypto String

No in-app purchases

Questions

Is Noise Patrol App free?
Noise Patrol App is free to download, with no in-app purchases.
Is Crypto String free?
Crypto String costs $0.99, with no in-app purchases.
Do Noise Patrol App or Crypto String have ads?
Neither Noise Patrol App nor Crypto String shows ads.
Which is updated more often, Noise Patrol App or Crypto String?
Noise Patrol App ships an update every 5 months, and Crypto String every 4 months. Most recently, Noise Patrol App was updated on September 9, 2026 and Crypto String on September 19, 2026.

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