Comparison

Fasttelphone vs Wattr

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

Head to head

Smart & Sustainable Swimming

Free

🔧 Utilities

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About

Fasttelphone

Features

Read full description

In combination with the FT600VK(K) Fasttel outdoor unit, this app shows your visitor sharply, both during the day and at night. Open multiple doors/gates remotely from anywhere in the world.

About

Wattr

Features

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The wattr pool control system makes use of an advanced swimming pool model to efficiently manage your pool's heat pump. Our self-learning algorithm integrates this model, your preferences, and weather forecasts to predict and optimize energy consumption. The system comes with a physical controller, connecting all your pool devices, and an easy-to-use mobile app, putting you in complete control. Please note: This app requires a Wattr module to function. The Wattr module is a separate device that connects to your pool installation and tracks its energy consumption. Without the Wattr module, the app will not be able to provide any data or functionality.

Screenshots

Fasttelphone4 screens

Wattr4 screens

Verdict

The call

The clearest difference is update cadence: Wattr at every 5 days against Fasttelphone's every 4 months. Fasttelphone's advantage is iOS requirement (13.0 vs 16.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Fasttelphone ships an update every 4 months, Wattr every 5 days. The most recent releases landed on September 23, 2026 and September 20, 2026 respectively.

Scorecard2 real differences · 4 level

Fasttelphone versus Wattr: the parameters behind the verdict, then further details
Parameter	Fasttelphone	Wattr
Price	Free	Free
Update frequency	Every 4 months	Every 5 days — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPod, Apple Watch — better	iPhone, iPad
Requires iOS	13.0 — better	16.6
Further details — not scored
Size	159 MB	58 MB
Age rating	4+	4+
Developer	Fasttel	Sempl

In-app purchases

None

Fasttelphone

No in-app purchases

None

Wattr

No in-app purchases

Questions

Is Fasttelphone free?

Fasttelphone is free to download, with no in-app purchases.

Is Wattr free?

Wattr is free to download, with no in-app purchases.

Do Fasttelphone or Wattr have ads?

Neither Fasttelphone nor Wattr shows ads.

Which is updated more often, Fasttelphone or Wattr?

Fasttelphone ships an update every 4 months, and Wattr every 5 days. Most recently, Fasttelphone was updated on September 23, 2026 and Wattr on September 20, 2026.