Dialer vs ST
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dialer
This app generates DTMF tones for interacting with landline phone systems and other devices that use these tones. It allows users to play tones directly from their device's speaker and offers features like saving favorite sequences.
- Generate DTMF tones
- Use with POTS and landline phones
- Save favorite tone sequences
- Adjustable volume
- Unlock expanded DTMF tones (Pro)
- Unlimited favorites (Pro)
- Customize tone and pause length (Pro)
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Dialer works with any Plain Old Telephone System (POTS) that accepts Dual tone multi-frequency (DTMF) tones such as a standard landline phone system. To use Dialer, you hold your phone's speaker up to a telephone handset or microphone and play the tone by pressing a button or by selecting one of your saved favorites. Store up to five favorites in the free version for easy dialing, such as calling cards, teleconference numbers, or complicated phone tree's. Commas act as pauses during the dialing tone sequence to allow time for prompts and other delays. Simply hold up your iPhone speaker to the landline telephone's microphone or handset and press dial. Some other devices also use DTMF tones to configure, Dialer is great for these as well. Volume is controlled by your devices volume buttons, so you can easily turn it up or down for just the right volume of your tones. Unlock Dialer Pro features such as unlimited favorites, and the ability to set the dial tone length and pause length (for commas). **Please note that some Voice over IP (VOIP) systems can have trouble recognizing the tones, for those systems try a longer key press allowing enough time for the system to register the tone. Purchase the optional upgrade to unlock these features: - Dial with precision: Unlock the power of four additional expanded DTMF tones – A, B, C, and D. Whether you're interacting with automated systems, entering passwords, or accessing exclusive services, Dialer Pro has got you covered. - Save your favorites effortlessly: With Dialer Pro, you can save an unlimited number of favorites directly from the main dialer screen, ensuring quick and easy access whenever you need it. - Customize your dialing experience: Take control over tone length and pause time when dialing your favorites. Tailor your settings to match your unique requirements, ensuring seamless compatibility with any phone system. ACCESSIBILITY FEATURES: Dialer is now fully accessible with comprehensive VoiceOver support: • Complete screen reader compatibility for blind and visually impaired users • Custom accessibility actions for DTMF tone testing via swipe gestures • Configurable VoiceOver delay timing for optimal audio experience • Clear button labels and navigation hints throughout the app • Accessible favorites management and editing Download Dialer today and make your dialing experience smarter, faster, and more enjoyable.
ST
This app converts photos and images into a format compatible with D-STAR transceivers for the Share Picture function. Users can crop images, add text like call signs, and transfer them wirelessly or via Bluetooth to supported transceivers.
- Image conversion for D-STAR Share Picture
- Image cropping
- Add text (call signs)
- Wireless transfer to transceiver
- Bluetooth transfer to transceiver
- Save cropped image as file
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The ST-4001I is an application to crop an image used for the Share Picture function of a D-STAR transceiver, and transfers it to the transceiver. ・Photos taken, or photos/images saved on the iPhone and iPad can be converted into the format used for the Share Picture function of the D-STAR transceiver. ・You can crop the image and enter text such as a call sign. ・The cropped image can be transferred through a network to the D-STAR transceiver. ・The cropped image can be transferred through a network or using Bluetooth to the D-STAR transceiver. ・You can also save the cropped image as a file. Refer to the INSTRUCTIONS for details. Device requirements: iOS12 or later Supported transceiver (As of July 2024) Transceivers that can transfer via Bluetooth Icom ID-52A/E Icom ID-52A/E PLUS Transceivers that can transfer via network Icom IC-705 Icom IC-905 Icom IC-9700* *Firmware version 1.20 or higher NOTE • Icom does not guarantee that the ST-4001I works on all iPhone and iPad. It may not work properly, depending on the OS version, installed applications, or other reasons. • The transceiver and iPhone and iPad must be connected to the same network to transfer an image to a transceiver through a network. • Bluetooth LE is used to connect to a transceiver using Bluetooth. Transferring an image may take some time due to a slow data transfer rate.
Screenshots
Verdict
The clearest difference is rating: ST at 5.0 against Dialer's 4.2. ST also leads on in-app purchases (none vs 1) and device support (3 vs 1). Dialer's advantage is update cadence (every 5 months vs every 27 months) and ratings volume (37 vs 4). On price, review sentiment and ads 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. Dialer sells 1 one-off in-app purchase. ST asks for nothing beyond the download.
ST holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Dialer has 37 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 57% of Dialer's written reviews are positive against 50% of ST's, so the app with the better star average is not the one people write more warmly about.
Dialer ships an update every 5 months, ST every 27 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Dialer | ST |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (37 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 57.1% of reviews — better | 50.0% of reviews |
| Number of ratings | 37 — better | 4 |
| Update frequency | Every 5 months — better | Every 27 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Emmanuel Tsouris | ICOM INCORPORATED |
Customer experience
Dialer
ST
In-app purchases
Dialer
- Pro Upgrade$4.99
ST
No in-app purchases









