Comparison

Calculy vs ESRA secure

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

Head to head
About

Calculy

This free calculator app offers advanced functions beyond basic arithmetic, including a comprehensive unit converter with daily updated currency rates. It supports a wide range of mathematical operations and is available for iPhone and iPad.

Highlights
  • Advanced mathematical functions
  • Unit converter with 220+ units
  • Daily updated currency rates
  • Supports iPad expanded layout
  • Hardware keyboard support on iPad
  • Ad-free experience
Features
Read full description

Calculy is a free calculator for iPhone and iPad. Small yet mighty and totally ad-free. Go beyond basic calculations with Calculy’s full range of functions: • unit converter with more than 220 units from 16 sections (including currencies with daily updated rates) • percentages • square, cube and nth power • square root, cube root and nth root • logarithm, natural logarithm, common logarithm • factorial, reciprocal • rounding • exponentiation to the power of 2, 10, e • Pi, e Euler's number, random numbers • sine, cosine, tangent • arcsine, arccosine, arctangent • hyperbolic sine, hyperbolic cosine, hyperbolic tangent The expanded layout for iPad handily displays all available function keys. Hardware keyboard is supported on the iPad.

About

ESRA secure

Features
Read full description

The ESRA Security App is used for an easy and intuitive operation of ESRA IP cameras. Once you have quickly and easily installed the cameras in your app, you can receive live images and recordings on your smartphone from anywhere. When unwanted occurrences take place, cameras with AI functionalities (e.g. person detection, face detection, line crossing detection), are able generate alarms by sending PUSH notifications, which are visible on the app.

Screenshots

Calculy4 screens
ESRA secure4 screens

Verdict

The call

The clearest difference is in-app purchases: ESRA secure at none against Calculy's 3. Calculy's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, device support 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. Calculy sells 3 one-off in-app purchases. ESRA secure asks for nothing beyond the download.

UpkeepUpdate frequency

Calculy ships an update every 2 weeks, ESRA secure every 2 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard2 real differences · 8 level
Calculy versus ESRA secure: the parameters behind the verdict, then further details
ParameterCalculyESRA secure
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews91.3% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better16.0
Further details — not scored
Size3 MB129 MB
Age rating4+4+
DeveloperLingo4you Mario Muller und Heike Pahlow GbRSimon Strobel

In-app purchases

3 purchases

Calculy

One-time3
  • Buy me a coffee$0.99
  • Buy me cookies$1.99
  • Buy me a pizza$3.99
None

ESRA secure

No in-app purchases

Questions

Is Calculy free?
Calculy is free to download, with in-app purchases available.
Is ESRA secure free?
ESRA secure is free to download, with no in-app purchases.
Do Calculy or ESRA secure have ads?
Neither Calculy nor ESRA secure shows ads.
Which is updated more often, Calculy or ESRA secure?
Calculy ships an update every 2 weeks, and ESRA secure every 2 months. Most recently, Calculy was updated on November 3, 2026 and ESRA secure on November 7, 2026.

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