HARMONY DSP vs SpecCheck Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HARMONY DSP
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The Harmony DSP App allows you to setup and tune your system with your smart phone or tablet. In the main screen you will find the Input Source menu where you can choose BT, HI-LEV, USB and AUX. Here you also find 8 Presets (saved into your device) to choose from, you access the Music Player, you have the Main and Subwoofer Volume, and the Advanced menu with Channels, EQ, System and Mixing. From the Channel Page, you can assign the function of each speaker, check the Phase for polarity, adjust the individual Channel Gains and set Delay in milliseconds or centimeters, for a rock solid and accurate front stage. The EQ page holds the heart and the brains of the App. You can use either the Graphic or the Paragraphic EQ’s. You can customize the crossovers to fit the needs of your individual system. You have adjustments for Gain, frequency, and Q factor. You can work on channels individually or you can link them. With the MIX function you can manually determine which inputs (USB-L/R, Digital-L/R, BT-L/R) will be used for each output (processing channel) and how much of each input the output will receive. The new Music Player function lets you have full control of all your favorite songs, inside the App. Be sure to connect a proper USB device containing audio files in the supported format (MP2/4, WMA, APE, FLAC, AAC, M4A,WAV, AIF, AIFC). From the App it is possible to access the folders and the contained audio files.
SpecCheck Pro
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Your complete reference guide and digital inventory for everything you own. SpecCheck Pro is the ultimate inventory management app for homeowners and vehicle owners. Effortlessly catalog your property, track maintenance schedules, and store important specifications all in one secure, beautifully designed app. Whether you're managing home maintenance, tracking vehicle service records, or cataloging valuable collections, SpecCheck keeps your important information organized and accessible whenever you need it. I created SpecCheck Pro after looking up what size home air conditioner filter and car oil filter too many times. Like many people I have used the notes app but I always lost track of what I called it and even then organizing it all was difficult at best. My other challenge was looking up the specs while at the big box stores, since the Cellular signal is often bad there, I had to walk to the fron of the store to get signal, etc. SpecCheck Pro stores your data right on your phone, no servers and no network access is needed. KEY FEATURES: • Complete Home Inventory - Document every room with dimensions, paint colors, flooring details, and window specifications • Vehicle Management - Track all your vehicles with comprehensive maintenance schedules, part numbers, and service history • Smart Maintenance Tracking - Never miss important maintenance with automated reminders for HVAC filters, water heater flushing, smoke detector testing, and vehicle services • Photo Documentation - Store unlimited photos of paint colors, receipts, items, vehicle parts, and important documents • Detailed Specifications - Keep track of part numbers, model numbers, filter sizes, paint codes, and measurements all in one place • Collections Organizer - Catalog tools, electronics, collectibles, and household items with serial numbers, warranties, and manuals • System Monitoring - Track home systems including HVAC, plumbing, electrical panels, water heaters with all technical specifications • Quick Favorites - Star your most-used specifications for instant access from the overview screen • Measurement Support - Full support for both Imperial and Metric units with automatic conversion • Backup & Restore - Secure JSON backup to iCloud Drive ensures your data is always safe and transferable between devices • Privacy Focused - All data stored locally on your device with no account required and no data collection PERFECT FOR: - Homeowners managing property maintenance - Vehicle enthusiasts tracking car specifications - Property managers documenting rental properties - Anyone preparing homes for sale or insurance claims - DIY enthusiasts keeping track of paint colors and part numbers Why SpecCheck? Stop searching through drawers for paint swatches, scrolling through photos for part numbers, or wondering when you last changed the furnace filter. SpecCheck puts every important detail about your property at your fingertips. Download SpecCheck today and take control of your home and vehicle information! --- Note: SpecCheck is a universal app optimized for iPhone and iPad. All data is stored locally on your device for maximum privacy and security.
Screenshots
Verdict
The clearest difference is in-app purchases: HARMONY DSP at none against SpecCheck Pro's 1. HARMONY DSP also leads on iOS requirement (11.0 vs 17.6). SpecCheck Pro's advantage is update cadence (every 6 months vs every 19 months). On price, ads 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. SpecCheck Pro sells 1 one-off in-app purchase. HARMONY DSP asks for nothing beyond the download.
HARMONY DSP ships an update every 19 months, SpecCheck Pro every 6 months. The most recent releases landed on May 16, 2026 and September 19, 2026 respectively.
| Parameter | HARMONY DSP | SpecCheck Pro |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 19 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | APEX Italy | Jaime McGauley |
In-app purchases
HARMONY DSP
No in-app purchases
SpecCheck Pro
- SpecCheck Premium$4.99









