Comparison

WattGuru vs Authenticator App

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

Head to head
About

WattGuru

Features
Read full description

WattGuru turns your iPhone, iPad and Mac into a practical toolbox for electricity and energy. Calculate values, document meter readings and save calculation cases clearly – without a WattGuru account, advertising or tracking. ELECTRICAL TOOLS - Ohm's law from any two known values - Power and current for DC, single-phase AC and three-phase AC - Cable cross-section, voltage drop and maximum cable length - Energy, runtime, battery charging and consumption costs - Series and parallel resistor networks plus voltage dividers - Conversion of electrical units METERS AND COSTS Record household, sub, appliance, generation and storage meters. Log standard and off-peak readings, follow consumption and costs in charts, and exchange your own data using CSV when needed. PROJECTS AND REFERENCE Save calculator results together with inputs and assumptions in projects. The built-in reference explains voltage, current, power, energy, cables, protective measures and safe measurement in clear language. PRIVATE AND AVAILABLE ACROSS DEVICES Your data stays on your device by default. Optional iCloud sync keeps meters, tariffs and projects in step across your own Apple devices. cgNetsphere does not receive this content. WattGuru includes no advertising, tracking or analytics services. WattGuru is a calculation, planning and documentation aid. Work on electrical installations must be carried out by qualified people. Applicable standards, protective measures and manufacturer instructions always take precedence.

About

Authenticator App

This app provides a secure and simple way to generate time-based one-time passwords for two-factor authentication. Protect your online accounts from unauthorized access with an extra layer of security for social media, banking, and work accounts.

Highlights
  • Generate time-based one-time passwords (TOTP)
  • Quick account setup via QR codes or manual entry
  • Seamless cross-device synchronization
  • Enhanced account security
  • Supports social media, banking, and work accounts
Features
Read full description

Stay protected online with Authenticator App: 2FA MFA — a secure and easy-to-use two-factor authentication app designed to keep your accounts safe. Generate time-based one-time passwords (TOTP) for all your favorite services in seconds. Add accounts quickly using QR codes or manual setup and enjoy seamless access across all your devices. Protect your accounts from unauthorized access and add an extra layer of security to your digital life. Whether you’re securing social media, banking apps, cloud storage, or work accounts — Authenticator App: 2FA MFA keeps your login process safe and simple. Privacy Policy: https://doc-hosting.flycricket.io/privacy-policy/611ec9a1-db0f-4b68-8fe1-93221c87c135/privacy Terms & Conditions: https://doc-hosting.flycricket.io/terms-conditions/7f456c36-8241-4115-b48c-45527c561d62/terms

Screenshots

WattGuru4 screens
Authenticator App4 screens

Verdict

The call

The clearest difference is update cadence: Authenticator App at every 6 days against WattGuru's fortnightly. WattGuru's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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. WattGuru sells 1 one-off in-app purchase and Authenticator App sells 8 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

WattGuru ships an update fortnightly, Authenticator App every 6 days. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

Scorecard2 real differences · 8 level
WattGuru versus Authenticator App: the parameters behind the verdict, then further details
ParameterWattGuruAuthenticator App
PriceFreeFree
Rating—4.8 (9 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—9 — better
Update frequencyFortnightlyEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size9 MB52 MB
Age rating4+4+
DeveloperMichael CaklecValerii Fedorak

In-app purchases

1 purchases

WattGuru

One-time1
  • WattGuru Full Version$3.99
8 purchases

Authenticator App

Subscriptions8
  • Premium Week3 Days trial$5.997 Days
  • Premium Week3 Days trial$6.997 Days
  • Premium Week3 Days trial$7.997 Days
Show 5 more
  • Premium Week3 Days trial$8.997 Days
  • Premium Week3 Days trial$9.997 Days
  • Premium Yearly$29.991 Year
  • Premium yearly$39.991 Year
  • Premium Yearly$49.991 Year

Questions

Is WattGuru free?
WattGuru is free to download, with in-app purchases available.
Is Authenticator App free?
Authenticator App is free to download, with in-app purchases available.
Do WattGuru or Authenticator App have ads?
Neither WattGuru nor Authenticator App shows ads.
Which is updated more often, WattGuru or Authenticator App?
WattGuru ships an update fortnightly, and Authenticator App every 6 days. Most recently, WattGuru was updated on September 9, 2026 and Authenticator App on September 21, 2026.

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