Diapason Audio Generator vs HAMmade GRID

This App is a powerful test tone generator. Yet it is extremely simple to use. No other audio generator App is as complete as this one whatever its price ! You can combine (add) up to 4 independent sources and send the result to left and/or right speaker. There is a phase switch for each channel. Available test tone types are: sine wave, square, triangle, saw tooth, white noise, pink noise. As you can see on sample images, first source is very basic and thus very easy to use. Second source is more complex and allows sweeping of frequency for sine waves. Third source is quite similar to the previous one except that frequencies are aligned with a musical scale (reference is 440Hz). Fourth source is for narrow band noise. Rotating knobs are there to ease frequency selection. The display at bottom of first tab is a rough waveform viewer, to monitor the generated signal. The output RMS power of a channel is indicated. Clipping is indicated as well should it occur (sources are added). Any comment, any feedback ? There is a blog for this. Note that the built-in speaker cannot reproduce the highest and lowest frequencies (below 400 and above 11000Hz to give an idea). You will ear these frequencies only with a good headphone or HiFi system.

Designed specifically for Amateur Radio Operators (Hams), HAMmade Grid is your ultimate companion for DXing, contesting, and field operations. The app now supports 6, 8, and 10 character Maidenhead Grid Locators, allowing more precise location information for advanced radio operations. Whether you are operating from your home QTH or working portable/rover; instantly find your Maidenhead Grid Locator, visualize the target station on the map, and point your antenna with precision. Key Features: -Precise Location & Grid: Instantly calculates your 6-character Maidenhead Grid Locator using real-time GPS data.  -Callsign Lookup: Enter any callsign to automatically fetch location, name, and station details. (requires paid QRZ.com membership) -QRZ.com & HamDB Integration: Log in with your QRZ.com account to access detailed profiles and station photos. No account? No problem. The app automatically falls back to HamDB public data for seamless lookups.  Band Availability Insight The app can now display the radio bands that are usable between two selected Maidenhead grid locators. This helps operators quickly evaluate which bands are likely to work at a given moment, making it easier to plan contacts, portable operations, and DX activities. -Smart Compass & Bearing: Calculates the exact Heading and Distance to the target station. The integrated live compass overlay helps you align your antenna directly to the signal source.  -Advanced Mapping: Visualize the target Grid square with Standard, Satellite, and Hybrid map modes.  -Unit Support: Switch between Kilometers (km) and Miles (mi) effortlessly.  -Dark Mode: Eye-friendly interface optimized for night operations.  -Multi-Language: Supports English, Turkish, Spanish, German, French, and more.