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Best Diagnostick Apps

219+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated May 2026

If you already know Apple Support, this is the deeper bench. 219+ diagnostick apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Compare top Diagnostick Apps (May 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Apple SupportApple SupportFree3.9★ (32K)YesNoJul 2026
2Device Monitor²Device Monitor²Free4.7★ (9.1K)NoYesJul 2026
3Phone DiagnosticsPhone DiagnosticsFree3.8★ (86)NoYesJul 2026
4Phone Doctor PlusPhone Doctor PlusFree4.4★ (325)YesNoJul 2026
5MyQuest for PatientsMyQuest for PatientsFree4.7★ (466K)NoNoJul 2026
6Deviapp - Device DiagnosticsDeviapp - Device DiagnosticsFree4.5★ (480)YesYesJul 2026
7M360 DiagnosticsM360 DiagnosticsFree4.8★ (6)NoNoJun 2026
8OBDeleven VAGOBDeleven VAGFree4.5★ (6.6K)NoYesJul 2026

Top Picks for Diagnostick

Apple Support#1

Apple Support by Apple

We’re here to help
Editor's Choice
🔧 Utilities
3.9😐(32K ratings)
FreeAds
Apple Support screenshot 1
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Apple Support screenshot 5

Access personalized solutions for all your Apple products and services in one convenient app. Troubleshoot issues with guided steps, chat with support, manage subscriptions, reset passwords, and find nearby service locations for Genius Bar appointments.

What We Love

  • 👍 Helpful and friendly support staff
  • 🚀 Quick response and resolution of issues
  • 💡 Useful troubleshooting features
  • 🔒 Secure and trustworthy service

Room to Improve

  • 🐛 Buggy and unreliable app performance
  • 🤖 Lack of knowledgeable support staff
  • ⏱️ Long wait times and repeated transfers
Device Monitor²#2

Device Monitor² by Marco Ricca

System activity info
Strong Contender
🛠️ Developer Tools
4.7😊(9.1K ratings)
FreeIn-App Purchases
#29in Developer Tools
Device Monitor² screenshot 1
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Device Monitor² screenshot 6

This app provides comprehensive system activity information for Apple devices, including detailed insights into hardware, sensors, and network status. It offers privacy controls, customizable widgets, and advanced testing and reporting features through optional in-app purchases.

What We Love

  • 🚀 Effective RAM cleaning
  • 🔍 Detailed device information
  • 🔧 Useful toolkit features
  • 💰 Fair one-time pricing

Room to Improve

  • 🐛 RAM cleaning issues after updates
  • 🔌 High background battery usage
  • 🕰️ Slow RAM cleaning process
Phone Diagnostics#3

Phone Diagnostics by HITEK_NOVA

Test & Find Repair Shop
Worth Considering
🔧 Utilities
3.8(86 ratings)
FreeIn-App Purchases
Phone Diagnostics screenshot 1
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Phone Diagnostics screenshot 6

Easily test and check all mobile device functionalities. This app is useful before purchasing a device, sending it for repair, or after receiving it back. It also helps you locate nearby repair shops.

More Diagnostick apps to explore

4
Phone Doctor Plus
Phone Doctor Plus
Phone Doctor Plus
by iDea Mobile Tech Inc.
Free

Diagnose over 40 hardware and system issues with this app. Monitor your phone's hardware, battery, memory, and storage. Track network usage and daily charging cycles to keep your device running smoothly.

40+ hardware diagnostic testsSystem monitoring (hardware, battery, memory, storage)Daily battery capacity and charging cycle recording
🔧 Utilities
(325)
ad-supported
5
MyQuest for Patients
MyQuest for Patients
MyQuest for Patients
by Quest Diagnostics, Inc.
Free

Access your lab results, schedule appointments, and manage your health information securely. Find nearby locations, share data with providers, and even purchase your own tests. Take proactive control of your well-being.

View lab results securelyFind nearby Quest locationsSchedule and manage appointments
🏥 Medical
(466K)
free
6
Deviapp - Device Diagnostics
Deviapp - Device Diagnostics
Deviapp - Device Diagnostics
Diagnostics and Safety
Free

Access detailed information about your device's software, memory, battery, and technical specifications. It also offers display diagnostics and a feature to block phishing sites for enhanced online safety and data protection.

Device information (software, memory, battery)Technical and physical characteristicsDisplay diagnostics
📊 Productivity
(480)
free with in-app purchases
7
M360 Diagnostics
M360 Diagnostics
M360 Diagnostics
by ATLAS SOFT Ltd.
Free

This utility app allows you to thoroughly test various components of your mobile device. It offers both automated and interactive tests to ensure everything is functioning correctly. Results can be emailed or shared directly with compatible service centers.

Component testingAutomated testsInteractive tests
🔧 Utilities
(6)
free
8
OBDeleven VAG
OBDeleven VAG
OBDeleven VAG
Scan your car & clear faults
Free

Transform your smartphone into a powerful car diagnostic tool. Easily scan, diagnose, and customize your vehicle's settings. Access advanced features like coding and live data to save time and money on car maintenance.

Advanced diagnosticsCoding and adaptationsOutput tests
🔧 Utilities
(6.6K)
free with in-app purchases
9
Biocare Diagnostics
Biocare Diagnostics
Biocare Diagnostics
by Biotricity Inc
Free

This app serves as a mobile hub for physicians and clinicians using a specific cardiac monitoring device. It allows for quick study initiation, real-time emergent event notifications, and comprehensive device fleet management. Users can also access patient reports and connect with support.

Quickly start cardiac monitoring studiesReceive emergent patient event notificationsManage Biocore device fleet
💪 Health & Fitness
(2)
free
10
BlueDriver OBD2 Scan Tool
BlueDriver OBD2 Scan Tool
BlueDriver OBD2 Scan Tool
Fear No Fix™
Free

This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.

Read and clear trouble codes (Check Engine, ABS, etc.)Generate professional-grade Repair ReportsAccess Mode 6 and smog readiness data
📊 Productivity
(14K)
free with in-app purchases
11
Tata 1mg - Healthcare App
Tata 1mg - Healthcare App
Tata 1mg - Healthcare App
Medicines, Tests & eConsults
Free

This platform offers a comprehensive healthcare experience, allowing users to order genuine medicines and health products, book lab tests with home sample collection, and consult with verified doctors online. It provides detailed medicine information and expert health tips.

Order medicines and health productsBook lab tests with home sample collectionConsult doctors online
🏥 Medical
(1.4K)
free with in-app purchases
12
Car Scanner ELM OBD2
Car Scanner ELM OBD2
Car Scanner ELM OBD2
The best OBD2 diagnostic tool!
Free

Monitor your car's performance, diagnose engine issues, and view sensor data in real-time. Customize your dashboard with gauges and charts, and reset fault codes. Supports a wide range of vehicles and offers advanced features for specific car brands.

Real-time sensor dataOBD fault code reading and resettingCustomizable dashboard with gauges
🔧 Utilities
(31K)
free with in-app purchases
13
Device Monitor & Diagnostics
Device Monitor & Diagnostics
Device Monitor & Diagnostics
CPU, System, Battery,Temp Info
Free

Gain deep insights into your device's hardware and performance. Monitor CPU, RAM, battery, and sensors, and run diagnostic tests. Generate and export detailed system reports to optimize your device's health and functionality.

Detailed hardware informationSystem report generationDiagnostic tests
📊 Productivity
(73)
free with in-app purchases
14
Diagnostics Elite Patient
Diagnostics Elite Patient
Diagnostics Elite Patient
by COMPANY SAFWA AL-TASHKHIS MEDICAL
Free
🏥 Medical
(0)
15
PhoneTest.App
PhoneTest.App
PhoneTest.App
Better than PhoneCheck
Free

Diagnose hardware and system issues on your iPhone with comprehensive tests. Offers both quick and in-depth diagnostic modes to pinpoint problems.

Hardware diagnosticsSystem diagnosticsExpress test mode
🔧 Utilities
(6)
free
16
Patient Diagnostics
Patient Diagnostics
Patient Diagnostics
by Patient Diagnostics PLLC
Free

This app allows patients to record health data, view care plans, and manage medications. Physicians can monitor patient assessments, respond to alerts, and communicate directly with patients.

Record vital signs and symptomsView personalized care plansTrack prescribed and OTC medications
💪 Health & Fitness
(1)
free
17
Veryon Diagnostics
Veryon Diagnostics
Veryon Diagnostics
by Veryon
Free

This app provides mobile access to aircraft defect management and guided troubleshooting. It helps identify chronic defects, manage resolutions, and analyze issues to improve aircraft safety and reliability. It also offers interactive fault isolation and knowledge capture to enhance repair rates.

Aircraft recurring defect managementGuided aviation troubleshootingAutomatic identification of chronic defects
📊 Productivity
(1)
free
18
DoctorC
DoctorC
DoctorC
by Simplify Wellness India Pvt Ltd
Free

Access discounted diagnostic tests and order healthcare services with ease. Instantly retrieve and manage your past medical reports anytime, anywhere.

Up to 50% off on diagnosticsEasy ordering of servicesReliable healthcare services
🏥 Medical
(120)
free with in-app purchases
19
Diagnostics Elite Hub
Diagnostics Elite Hub
Diagnostics Elite Hub
Trusted Diagnostic Services
Free

This platform provides technical assistance for individuals and businesses. Users can create support tickets, chat with experts, and receive real-time help for troubleshooting issues. It offers efficient connection to support specialists.

Create support ticketsChat with expertsReal-time technical assistance
🏥 Medical
(1)
free
20
MODI Mobile Diagnostics
MODI Mobile Diagnostics
MODI Mobile Diagnostics
MODI Mobile Diagnostics
Free
🔧 Utilities
(0)

FAQ about Diagnostick

What are the best diagnostick apps for iPhone?
Apple Support tops our diagnostick apps ranking as of May 2026, with a 3.9-star average from 32K App Store ratings, and it's free to download.
Yes — 20 of the top diagnostick apps we rank are free to download, including Apple Support and Device Monitor².
Apple Support shows ads and has no in-app purchases, according to its App Store listing as of May 2026.
We track 219+ diagnostick apps on the iOS App Store as of May 2026, ranked by rating, recency, and analysis of real user reviews.
The Apple Support app provides personalized solutions for all your Apple products and services. You can learn how to manage subscriptions, reset your Apple Account password, troubleshoot issues with guided steps, chat with support, and find nearby locations to book Genius Bar or Apple Authorized Service Provider appointments.
No, you are not required to purchase an AppleCare+ plan to use the Apple Support app. The app is available to all Apple product owners seeking support, regardless of whether they have an AppleCare+ plan.

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