Best Sn400 Apps

237+ iOS apps curated and reviewed

4.1 avg rating
20 free apps
Updated June 2026

With an average user rating of 4.1★, the sn400 category is one of the App Store's strongest. Browse all 237+ apps we track, sorted so the most loved ones surface first.

Compare top Sn400 Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1SN400SN400FreeNoNoMay 2026
2iAquaLinkiAquaLinkFree4.7★ (95K)YesNoJul 2026
3SkillCat: EPA 608 & HVACSkillCat: EPA 608 & HVACFree4.9★ (8.2K)NoYesJul 2026
4Moen FloMoen FloFree4.3★ (17K)NoNoJul 2026
5Daikin Tech HubDaikin Tech HubFree4.6★ (3.6K)NoNoJul 2026
6HVACR Check & ChargeHVACR Check & ChargeFree4.8★ (17K)NoNoJul 2026
7Pipe Trades Pro CalcPipe Trades Pro CalcFree4.8★ (3.6K)NoYesJul 2026
8Legacy ViewLegacy ViewFree4.7★ (4.4K)NoNoJul 2026

Top Picks for Sn400

iAquaLink#2

iAquaLink by Zodiac Pool Systems

Strong Contender
🌟 Lifestyle
4.7😞(95K ratings)
FreeAds
iAquaLink screenshot 1
iAquaLink screenshot 2
iAquaLink screenshot 3
iAquaLink screenshot 4
iAquaLink screenshot 5
iAquaLink screenshot 6

Control and monitor your swimming pool equipment remotely from your mobile device. Adjust settings like pump speed, temperature, and lighting, and automate cleaning schedules. Offers comprehensive management for various pool systems and accessories.

What We Love

  • 🚀 Easy to control pool and spa remotely
  • 👍 Convenient for monitoring pool status
  • 💡 Good integration with Alexa
  • 🔒 Reliable connectivity when hardwired

Room to Improve

  • 🐛 Frequent connectivity issues and app crashes
  • 👎 Limited functionality in the app compared to web interface
  • 💤 Slow response times and laggy performance
SkillCat: EPA 608 & HVAC#3

SkillCat: EPA 608 & HVAC by SkillCat Inc

Accredited Online Trade School
Worth Considering
📚 Education
4.9😊(8.2K ratings)
FreeIn-App Purchases
#60in Education
SkillCat: EPA 608 & HVAC screenshot 1
SkillCat: EPA 608 & HVAC screenshot 2
SkillCat: EPA 608 & HVAC screenshot 3
SkillCat: EPA 608 & HVAC screenshot 4
SkillCat: EPA 608 & HVAC screenshot 5
SkillCat: EPA 608 & HVAC screenshot 6

This app offers accredited online trade school courses and certifications for HVAC, plumbing, electrical, and more. Learn at your own pace, on your phone, and earn valuable credentials like EPA 608 and OSHA-10 without traditional school debt.

What We Love

  • 🚀 Efficient learning experience
  • 👍 Comprehensive course content
  • 💡 Convenient online/mobile access
  • 👍 Affordable certification process

Room to Improve

  • 🐛 Bugs and glitches in the app
  • 🔍 Lack of dedicated support
  • 🔍 Unclear subscription policies

More Sn400 apps to explore

4
Moen Flo
Moen Flo
Moen Flo
For a Smarter Home
Free

Manage your home's water system remotely. This app connects to smart devices to monitor leaks, control faucets, manage sprinklers, and track water usage for peace of mind and conservation.

Remote water controlWhole-home leak protectionSmart faucet operation
🔧 Utilities
(17K)
free
5
Daikin Tech Hub
Daikin Tech Hub
Daikin Tech Hub
by Goodman Global Holdings, Inc.
Free

This app provides Daikin service contractors with instant access to all technical and service information for Daikin products. It includes product specifications, manuals, error code troubleshooting, interactive field settings, and service videos. The app works online and offline, syncing data automatically for the latest updates.

Product Technical SpecificationsAll Documents in one placeError Codes with troubleshooting
💼 Business
(3.6K)
free
6
HVACR Check & Charge
HVACR Check & Charge
HVACR Check & Charge
PT Charts Superheat Subcooling
Free

This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.

Instant refrigerant charge calculatorSuperheat calculator (non-TXV)Subcooling calculator (TXV)
🔍 Reference
(17K)
free
7
Pipe Trades Pro Calc
Pipe Trades Pro Calc
Pipe Trades Pro Calc
Calculator | Welding & Piping
Free

This app provides advanced calculation tools and comprehensive data for pipe trade professionals. It streamlines workflows for pipefitters, welders, and steamfitters with features for measurements, fluid dynamics, and material specifications. Designed for efficiency and accuracy, it works offline for on-site use.

Advanced measurement calculationsFluid dynamics and pressure analysisComprehensive pipe data access
🔧 Utilities
(3.6K)
free with in-app purchases
8
Legacy View
Legacy View
Legacy View
Water system info & control
Free

Monitor and control your Chandler Systems water treatment system with ease. View system settings, track water usage, and initiate cycles remotely. Connect to multiple valves from a single device and update valve firmware.

View valve settings and statusChange valve settings remotelyMonitor water usage
🌟 Lifestyle
(4.4K)
free
9
Ref Tools
Ref Tools
Ref Tools
All-in-one HVACR app
Free

This app provides HVACR technicians with essential tools and information for field service. It includes refrigerant calculators, troubleshooting guides, product finders, and access to spare parts. Listen to educational podcasts to enhance your knowledge on the go.

Refrigerant Slider for P/T calculationsSolenoid valve coil testing toolRefrigeration system troubleshooting guide
🔧 Utilities
(47)
free
10
AC Remote・Air Conditioner
AC Remote・Air Conditioner
AC Remote・Air Conditioner
Universal AC Remoto Control
Free

Transform your smartphone into a universal remote for your air conditioner. Effortlessly manage temperature, modes, fan speed, and set timers for a comfortable indoor environment. Compatible with numerous AC brands for convenient climate control.

Universal AC controlQuick setupMode selection
🔧 Utilities
(298)
subscription
11
Pipedata
Pipedata
Pipedata
Fast access to component data
Free

Access dimensional and weight data for over 70 common ASME piping components. Provides information in Metric, US Customary Units, and Inch/Fractions, with audited weights for valves, flanges, and other parts. Ensures accuracy and up-to-date information based on the latest ASME specifications.

Dimensional data for 72+ ASME piping componentsWeight information for valves and flangesSupports Metric, US Customary Units, and Inch/Fractions
📊 Productivity
(39)
free
12
Bell & Gossett - SystemSyzer
Bell & Gossett - SystemSyzer
Bell & Gossett - SystemSyzer
by Xylem Inc.
Free

This HVAC tool aids in piping system design, offering calculators for friction loss, velocity, and heat load. It includes a Cv tool and a specialized calculator for balancing contractors to determine valve settings and flow rates.

Friction loss and velocity calculatorHeat/cooling load calculationCv tool
🔍 Reference
(7)
free
13
MHD Flasher
MHD Flasher
MHD Flasher
by MHD Tuning UG (haftungsbeschraenkt)
Free

This app allows for complete DME remapping of BMW vehicles, offering maximum performance and safety. It provides full OBD flashing, pre-configured performance maps, and advanced engine monitoring capabilities. Users can also customize various flash options for a personalized driving experience.

Complete DME remappingFull OBD flashingPre-configured performance maps (Stage 1, 2, E85)
🔧 Utilities
(203)
free
14
Fieldpiece Job Link
Fieldpiece Job Link
Fieldpiece Job Link
by Fieldpiece Instruments, Inc
Free

This app connects wirelessly with compatible HVACR tools to help professionals troubleshoot, diagnose, and evaluate HVACR systems. It serves as a central hub for managing wireless tools and business solutions, linking your equipment to your jobs.

Wireless tool connectivitySystem troubleshootingDiagnostic capabilities
💼 Business
(490)
free
15
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
BITZER REFRIGERANT RULER
Determine refrigerant data
Free

This tool quickly determines refrigerant data, including properties, safety groups, GWP, and ODP. It offers intuitive temperature-to-pressure conversion and supports both metric and imperial units. Access detailed information and links to online resources for over 100 refrigerants.

Refrigerant data lookupTemperature-to-pressure conversionMetric and imperial unit support
🔍 Reference
(1.1K)
free
16
Symbio® Service & Installation
Symbio® Service & Installation
Symbio® Service & Installation
by TRANE U.S. INC
Free

This application allows for the setup, monitoring, and servicing of specific HVAC controllers without requiring a PC. It connects via Bluetooth, Wi-Fi, or secure remote access to manage equipment status, parameters, and diagnostics.

View equipment status, alarms, and diagnosticsConfigure controller settingsEdit setpoints and operational parameters
💼 Business
(97)
free
17
Water Flow Calculators
Water Flow Calculators
Water Flow Calculators
by Waterous
Free

This educational app provides calculations for water flow using friction loss, smooth nozzle, NFA, and Iowa formulas. It's designed for professionals and students needing quick and accurate fluid dynamics computations.

Friction loss calculationsSmooth nozzle calculationsNFA formula support
📚 Education
(5)
free
18
Elkhart Hard Facts Calculator
Elkhart Hard Facts Calculator
Elkhart Hard Facts Calculator
by Elkhart Brass
Free

This utility app provides essential calculators for accurate flow testing, covering various nozzle types, pump discharge pressures, and fire flow formulas. It also includes direct links to helpful instructional videos.

Smooth Bore Discharges & Flow/Pressure calculatorNozzle Reaction calculators (Smooth Bore & Fog)Pump Discharge Pressure calculators
🔧 Utilities
(12)
free
19
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
by Designstein, llc
Free

This app offers a comprehensive suite of tools for HVAC technicians. It provides interactive guides, step-by-step repair instructions, and calculators for various HVAC calculations including superheat, subcooling, and duct sizing.

Superheat & Subcooling chargingDuct sizing & layout calculatorCompressor windings troubleshooter
🔧 Utilities
(185)
free
20
testo Smart
testo Smart
testo Smart
Fast and reliable measurements
Free

This app supports measurements for refrigeration, HVAC, and heating systems. It also aids in food safety, frying oil quality, and indoor climate monitoring. Quickly interpret data, create digital reports with photos, and send them via email.

All-in-one system measurementsGraphical display of measured valuesDigital PDF/CSV measurement reports
📊 Productivity
(165)
free with in-app purchases

FAQ about Sn400

Are there free sn400 apps for iPhone?
Yes — 20 of the top sn400 apps we rank are free to download, including SN400 and iAquaLink.
SN400 has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 237+ sn400 apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.