telliSize vs Knock Knock Pros
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
telliSize
Quickly size water heater applications and generate project schematics, plumbing layouts, and submittals. Calculations are based on real-world test data and proven sizing methods.
- Water heater application sizing
- Project schematics generation
- Plumbing layout creation
- Submittal package generation
- Real-world test data calculations
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The Intellihot app helps you size various applications in minutes and identify the right water heaters for your application. Simply enter basic details about the project and instantly generate project schematics, plumbing layouts, and submittals. Our calculations are backed by real world test data and proven sizing methods.
Knock Knock Pros
Connect with skilled professionals for various home services, from plumbing and electrical work to cleaning and repairs. Easily book, track, and pay for services with a user-friendly interface and vetted providers.
- Wide range of services (196+ categories)
- GPS tracking for professionals
- Easy and intuitive booking process
- Vetted and trusted service providers
- Flexible scheduling options
- Secure in-app payments
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Welcome to Knock Knock : Your Ultimate Home Service Solution Discover the easiest way to transform your home with Knock Knock – the app that connects you with skilled professionals for all your home service needs. From plumbing and electrical work to cleaning and repairs, Knock Knock has got you covered. Why Choose Knock Knock? Wide Range of Services: 196+ service categories are available. Find professionals for every job, big or small. Our curated network of experts includes plumbers, electricians, cleaners, handymen, and more! GPS Knock Knock GPS feature ensures you're never left guessing, providing real-time updates on your service professional's location for a stress-free experience Easy Booking: With just a few taps, schedule the services you need at your preferred time. Our intuitive interface makes the booking process seamless. Trusted Professionals: Rest easy knowing that every house service provider on Knock Knock is vetted, experienced, and committed to delivering top-notch service. Read reviews and choose with confidence. Flexible Scheduling: Whether it's an urgent repair or a planned renovation, Knock Knock offers flexible scheduling to accommodate your busy life. Secure Payments: Pay with confidence through our secure payment gateway. No more haggling or cash transactions – it's all taken care of in the app. User-Friendly Experience: Knock Knock is designed with you in mind. Easily navigate through the app, manage bookings, and track services with a user-friendly interface. How It Works: Select Your Service: Browse through a variety of services available on Knock Knock. Whether it's fixing a leaky faucet or giving your home a makeover, we have the right professionals for you. Choose a Pro: Explore profiles, read reviews, and select the service provider that best fits your needs. Book Your Service: Set the date and time that works for you. Confirm your booking, and your chosen professional will be on their way. Enjoy Quality Service: Sit back and relax while our skilled professionals take care of the job. Rate and review to help maintain our high standards. Transform your home effortlessly with Knock Knock – where quality service meets convenience. Download the app now and experience a new era of home services!
Screenshots
Verdict
The clearest difference is update cadence: Knock Knock Pros at weekly against telliSize's every 9 months. Knock Knock Pros also leads on iOS requirement (15.1 vs 27.0). On price, rating, ratings volume 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for telliSize against 5.0 for Knock Knock Pros. Both are backed by a comparable volume of ratings — 3 and 4 respectively.
telliSize ships an update every 9 months, Knock Knock Pros weekly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | telliSize | Knock Knock Pros |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (4 ratings) |
| Number of ratings | 3 | 4 — better |
| Update frequency | Every 9 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 27.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 16 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Intellihot | Tim Sparks |
Customer experience
telliSize
Knock Knock Pros
In-app purchases
telliSize
No in-app purchases
Knock Knock Pros
No in-app purchases
Questions
Is telliSize free?
Is Knock Knock Pros free?
Which has better reviews, telliSize or Knock Knock Pros?
Do telliSize or Knock Knock Pros have ads?
Which is updated more often, telliSize or Knock Knock Pros?
Other comparisons
