Comparison

DTMF Dial vs Blynk IoT

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DTMF Dial

This utility allows you to dial phone numbers from your iPhone contacts on landline or pay phones. Simply select a contact, hold your device near the mouthpiece, and initiate the call.

Highlights
  • Dial iPhone contacts on landlines
  • Edit numbers before dialing
  • Adjust dialing speed
  • Works with pay-phones
  • Uses device's speaker for dialing
Features
Read full description

Do you often find yourself looking up a contact on your iPhone/iPad/iPod Touch and then dialing the number by hand on another phone? Operator lets you conveniently dial phone numbers in your iPhone contacts on landline phones and pay-phones. Just fire up Operator, select a number from your address book, lift the receiver, hold your iOS device near the mouthpiece and hit the Dial button! You can even edit the number before dialing it, in case you need to change a prefix or add a suffix. You can also adjust the dialing speed via the Settings app.

About

Blynk IoT

Build custom IoT apps without coding using a drag-and-drop interface. Manage devices, visualize data, and send real-time alerts. Supports over 400 hardware boards and offers secure, scalable cloud infrastructure.

Highlights
  • Drag-and-drop IoT app builder
  • Device management and control
  • Sensor data visualization
  • OTA firmware updates
  • Real-time alerts and notifications
  • Support for 400+ hardware boards
  • Secure cloud infrastructure
Read full description

Trusted by over 1 million IoT developers worldwide, Blynk lets you build and customize beautiful, feature-rich apps without writing a single line of code. Blynk solves IoT complexity at every stage with easy workflows for end-user device activation, WiFi provisioning, seamless OTA firmware updates, enterprise-grade security, and much more! ⊲ Not Just an App... Blynk is an award-winning low-code IoT platform that supports IoT at any scale—from personal prototypes to millions of connected devices in production environments. 2024 Leader: IoT Platforms (G2) 2024 High Performer: IoT Management (G2) 2024 Momentum Leader: IoT Development Tools (G2) Designed, developed, tested, and continuously maintained, Blynk provides the building blocks of a fully integrated cloud IoT platform software solution—loved by customers and their end-users around the world! ⊲ Here’s What You Get When You Sign Up: Blynk.Apps: Drag-n-drop IoT app builder to build and brand feature-rich mobile apps in minutes and instantly manage devices, users, and data remotely. Blynk.Console: A powerful web portal to manage devices, users, and organizations, perform OTA firmware updates, and handle other important business functions. Blynk.Cloud: Cloud infrastructure needed to securely host, scale, and monitor your IoT solutions. Receive, store, and process data in real-time or at intervals. Connect to your other systems via APIs. Private server options are available. ⊲ Secure, Scalable Enterprise-Grade Infrastructure Processing over 180 billion hardware messages monthly, Blynk provides secure, end-to-end encryption between the cloud, apps, and devices with 24/7 incident monitoring, ensuring you don’t have to worry about security. ⊲ Robust Hardware Compatibility Supporting over 400 hardware development boards—including ESP32, Arduino, Raspberry Pi, Seeed, Particle, SparkFun, Blues, Adafruit, Texas Instruments, and more—Blynk makes it easy to connect your devices to the cloud using WiFi, Ethernet, Cellular (GSM, 2G, 3G, 4G, LTE), LoRaWAN, HTTPs, or MQTT. ⊲ Flexible Connection Options Blynk Library: Pre-configured C++ library for low-latency, bi-directional communication. Blynk.Edgent: Advanced features with less code for data exchange, WiFi provisioning, OTA firmware updates, and API access to apps and cloud. Blynk.NCP: High-quality network co-processor integration for dual MCU architecture. HTTP(s) API: Standard protocol to securely communicate and transfer data. MQTT API: Secure, versatile two-way communication for building MQTT dashboards or panels. ⊲ What an IoT Developer Can Do with Blynk: • Easy Device Activation • Device WiFi Provisioning • Sensor Data Visualization • Shared Access to Devices • Data Analytics • Remote Device Control • Asset Tracking • Firmware Over-the-Air (OTA) Updates • Multi-Device Management with a Single App • Real-Time Alerts: Send and receive push and email notifications. • Automations: Create scenarios for one or multiple devices based on various triggers. • Manage Multi-Level Organizations and Access to Devices • Voice Assistant Integration: Interact with devices using Amazon Alexa and Google Home. To use the Blynk IoT app, you must agree to our Terms of Use - https://blynk.io/tos

Screenshots

DTMF Dial3 screens
Blynk IoT4 screens

Verdict

The call

The clearest difference is rating: Blynk IoT at 4.5 against DTMF Dial's 1.0. Blynk IoT also leads on update cadence (monthly vs every 27 months) and ratings volume (830 vs 5). DTMF Dial's advantage is in-app purchases (none vs 7) and device support (3 vs 1). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Blynk IoT sells 7 in-app purchases, starting at $6.99 per month. DTMF Dial asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Blynk IoT holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Blynk IoT has 830 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 36% of DTMF Dial's written reviews are positive against 42% of Blynk IoT's.

UpkeepUpdate frequency

DTMF Dial ships an update every 27 months, Blynk IoT monthly. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.

Scorecard7 real differences · 3 level
DTMF Dial versus Blynk IoT: the parameters behind the verdict, then further details
ParameterDTMF DialBlynk IoT
PriceFreeFree
Rating1.0 (5 ratings)4.5 (830 ratings) — better
Positive reviews36.4% of reviews42.0% of reviews — better
Number of ratings5830 — better
Update frequencyEvery 27 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS9.0 — better18.6
Further details — not scored
Size12 MB86 MB
Age rating4+4+
DeveloperiPhonso GmbHBlynk Technologies

Customer experience

DTMF Dial

All ratings5 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews11 reviews
Positive36.4%
Neutral9.1%
Negative54.5%

Blynk IoT

All ratings830 ratings
Positive88.4%
Neutral3.1%
Negative8.4%
Written reviews174 reviews
Positive42.0%
Neutral5.7%
Negative52.3%

Bugs and requests

DTMF Dial

Not enough reviews yet to summarise bugs or requests.

Blynk IoT

Reported bugs

4 issues
  • Connectivity issues with devices
  • Widgets not working as expected
  • Account deletion without warning
  • Incompatibility with older hardware

Requested features

5 requests
  • Dark mode option
  • Bluetooth support
  • Better documentation and tutorials
  • Restore legacy app functionality
  • Affordable pricing for hobbyists

In-app purchases

None

DTMF Dial

No in-app purchases

7 purchases

Blynk IoT

Subscriptions7
  • Blynk MAKER - Monthly$6.991 Month
  • Blynk Starter - Monthly$29.001 Month
  • Blynk PRO (40 users) Monthly$48.991 Month
Show 4 more
  • Blynk MAKER - Yearly$59.991 Year
  • Blynk PRO (100 users) Monthly$98.991 Month
  • Blynk PRO (50 users) Monthly$99.001 Month
  • Blynk PRO (500 users) Monthly$299.991 Month

Questions

Is DTMF Dial free?
DTMF Dial is free to download, with no in-app purchases.
Is Blynk IoT free?
Blynk IoT is free to download, with in-app purchases available.
Which has better reviews, DTMF Dial or Blynk IoT?
Blynk IoT is rated higher. DTMF Dial averages 1.0 out of 5 from 5 ratings, while Blynk IoT averages 4.5 from 830 ratings.
Do DTMF Dial or Blynk IoT have ads?
Neither DTMF Dial nor Blynk IoT shows ads.
Which is updated more often, DTMF Dial or Blynk IoT?
DTMF Dial ships an update every 27 months, and Blynk IoT monthly. Most recently, DTMF Dial was updated on November 1, 2026 and Blynk IoT on November 13, 2026.

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