RTA Pro vs DIY SMART KEY
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RTA Pro
Transform your iOS device into a professional audio analysis tool. Analyze ambient noise frequencies, pinpoint room resonance, and set up sound systems for events. Features include custom calibration, multiple display modes, and adjustable speed settings.
- Real-time audio spectrum analysis
- Frequency range 32Hz to 16kHz
- Linear, dB(A), and dB(C) weightings
- 1/3 Octave Bands, Octave Bands, and FFT display
- Adjustable speed settings
- Custom calibration options
Read full descriptionHide full description
RTA Pro is a real time audio spektrum analyzer. It turns your iOS device into a powerful audio test system usually seen only in audio research laboratories and music studios. Such instruments are used to analyze the frequency spectrum of ambient noise, e.g. to be able to pinpoint frequencies which cause rumble in a room. Another use is the level setting setting of PA systems for concerts. Features: RTA Pro requires iOS11 or later and has been calibrated for the microphones of most iPhones. Custom calibration is also possible. The frequency range is 32Hz to 16kHz. Linear display, as well as weightings for measuring dB(A) and dB(C) is provided. Apart from 1/3 Octave Bands and Octave Bands, RTA Pro also features the display of a Fast Fourier Transform (FFT). The speed is adjustable to impulse, 128ms and 1 second.
DIY SMART KEY
Transform your traditional remote control systems into smartphone-controlled ones. This app allows you to manage car alarms, motorcycle alarms, home security, and door automation systems directly from your phone via a Bluetooth module.
- Smartphone control for alarms and door automation
- Supports automotive, motorcycle, and home systems
- Automatic locking/unlocking based on proximity
- Compatible with various fixed and learning code systems
- Bluetooth pairing with I-KEY module
- Code learning from original remotes
Read full descriptionHide full description
The DIY SMART KEY(model# I-KEY, hereby is also called I-KEY module) is designed to upgrade the traditional remote control system into Smartphone control system. Its applicable range is not only for the automotive aftermarket alarm or keyless system, but also for motorcycle alarm system, home alarm system and door automations. The DIY SMART KEY will give you fingertip control over all the identical features of your installed devices(see applicable systems) and for even more convenience, add an I-KEY module to your car or motorcycle alarm system, your car or motorcycle will unlock when it detects your approaching and lock again automatically when you walk away. The applicable systems to add an I-KEY module are as following: For most brands of keyless entry system For aftermarket add-on car alarm system: (1) Hopping code system produced by Micca Auto (2) Most brands of car alarm system coded as following For motorcycle alarm system: (1) Hopping code system produced by Micca Auto (2) Most brands of motorcycle alarm system coded as following For home alarm system coded as following For door automations coded as following More specifically, please see the compatible encoder and frequency of your installed systems as bellows: Encoder: Fixed code: PT2240, PT2260, etc Learning code: EV1527, EV527, etc Factory code: Hopping code of Micca system(By default) Frequency: Range from 300MHz to 868MHz How do you get start with the DIY SMART KEY for a Smartphone control of your device? Just follow these simple steps: Download the free DIY SMART KEY app Pairing the I-KEY module with your Smartphone by Bluetooth with the DIY SMART KEY app Finish code learning of your original remote control to the I-KEY module Put the I-KEY module near to the main unit of your installed systems Start using your DIY SMART KEY FAQs: -If my remote control is for the original factory keyless entry system, can I add an I-KEY module? -Yes, but before that you need to install our upgrade car alarm system model#KE700 and then you could add the I-KEY module to upgrade your original remote control into DIY SMART KEY control. 2. –How long is the connecting distance of the DIY SMART KEY to the device? -The distance is within 30m. 3. –Can I pair the I-KEY module with different devices at the same time? -We’re sorry that for the moment one I-KEY module could only be paired with one device. 4. –Can I add various devices in the same DIY SMART KEY app? - The DIY SMART KEY app can be added with various devices pairing by different I-KEY modules, but the devices couldn’t be used at the same time, you could only choose to control one device. 5. –If there are 2 smart phones in my family, is it possible to connect with the same I-KEY module of our vehicle by 2 smart phones? -Yes, an I-KEY module could be paired at the same with different smart phones, but it can only be controlled by one smart phone in the same time, for example, if one smart phone is connected, the other one won’t be available.
Screenshots
Verdict
The clearest difference is review sentiment: RTA Pro at 50% against DIY SMART KEY's 0%. RTA Pro also leads on chart position (#191 vs unranked). DIY SMART KEY's advantage is price (Free vs $5.99) and update cadence (monthly vs every 3 months). On ads, in-app purchases 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
DIY SMART KEY is free to download; RTA Pro costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RTA Pro ships an update every 3 months, DIY SMART KEY monthly. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.
| Parameter | RTA Pro | DIY SMART KEY |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #191 — better | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 7.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthias Schorer | 师松 梁 |
Customer experience
RTA Pro
DIY SMART KEY
In-app purchases
RTA Pro
No in-app purchases
DIY SMART KEY
No in-app purchases









