Comparison

Calculator Silver vs GEMINI Pump System

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

Head to head
About

Calculator Silver

This utility app offers a comprehensive calculator experience with features like a backspace key, printable/emailable calculation history, and Apple Watch integration. Customize the look and feel, and easily copy results to other applications.

Highlights
  • Apple Watch calculator
  • Today View Extension
  • Printable/emailable history
  • Backspace key
  • Copy/paste functionality
  • Customizable display and themes
Features
Read full description

*Featured in What´s Hot on iTunes* The BEST Calculator! App for iPad, iPhone and iTouch. Ever lost your train of thought half way through a calculation and thought how handy it would be to have a print out or e-mail of your work? Features: - Print out the calculation history or send by PDF. - Correct with a backspace key if you enter a wrong digit without having to redo all. - Email, PDF or Print the calculation history. - PDF the Tape and access previous in the Documents Folder. - Exchange Documents in iTunes or open in iBooks, Email, etc. - Rename and share PDF documents. - Copy and Paste numbers to other Apps, by tapping on the display. - Show calculations on an Apple TV or an external monitor with a cable. - Change number display to Fixed, Scientific, etc., by tapping on the display. - Customize the background, fixed digits, fonts, colors and sizes. - Customize the Tape font, size and color. - An audible sound confirms if you have pressed a button, which can be easily disabled by touching the speaker. - Previous calculation is repeated when the equal sign is pressed. - Grand Total calculated. - Numbers in Memory may be logged to the Tape. - A visible and audible error when trying to divide by zero or take the square root of a negative number. - Numbers are shown in local format, depending on your Region Formats, i.e. comma used in Europe.

About

GEMINI Pump System

Monitor your sump pump system remotely. Check water levels, battery status, and pump operations. Features Local Link technology for offline connectivity.

Highlights
  • Remote water level check
  • Battery health monitoring
  • Pump status updates
  • Local Link offline connectivity
  • Wi-Fi restoration notification
Features
Read full description

Introducing the GEMINI™ mobile app. Use it to remotely check your sump water level, battery health and charge, and pump state. If your Wi-Fi router goes out the innovative Local Link™ technology lets you check pump’s updates from the comfort of your bed, until Wi-Fi comes on when power is restored

Screenshots

Calculator Silver4 screens
GEMINI Pump System3 screens

Verdict

The call

The clearest difference is price: GEMINI Pump System at Free against Calculator Silver's $1.99. GEMINI Pump System also leads on iOS requirement (12.4 vs 26.0). Calculator Silver's advantage is rating (4.4 vs 2.3) and review sentiment (89% vs 50%). On ratings volume, ads, in-app purchases and monetization model 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

GEMINI Pump System is free to download; Calculator Silver costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calculator Silver holds the better App Store score, 4.4 against 2.3. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 89% of Calculator Silver's written reviews are positive against 50% of GEMINI Pump System's.

UpkeepUpdate frequency

Calculator Silver ships an update every 2 months, GEMINI Pump System every 43 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
Calculator Silver versus GEMINI Pump System: the parameters behind the verdict, then further details
ParameterCalculator SilverGEMINI Pump System
Price$1.99Free — better
Rating4.4 (5 ratings) — better2.3 (3 ratings)
Positive reviews88.9% of reviews — better50.0% of reviews
Number of ratings5 — better3
Update frequencyEvery 2 months — betterEvery 43 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.012.4 — better
Further details — not scored
Size16 MB10 MB
Age rating4+4+
DeveloperHannes SverrissonWAYNE/SCOTT FETZER COMPANY

Customer experience

Calculator Silver

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews9 reviews
Positive88.9%
Neutral11.1%
Negative0.0%

GEMINI Pump System

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Calculator Silver

No in-app purchases

None

GEMINI Pump System

No in-app purchases

Questions

Is Calculator Silver free?
Calculator Silver costs $1.99, with no in-app purchases.
Is GEMINI Pump System free?
GEMINI Pump System is free to download, with no in-app purchases.
Which has better reviews, Calculator Silver or GEMINI Pump System?
Calculator Silver is rated higher. Calculator Silver averages 4.4 out of 5 from 5 ratings, while GEMINI Pump System averages 2.3 from 3 ratings.
Do Calculator Silver or GEMINI Pump System have ads?
Neither Calculator Silver nor GEMINI Pump System shows ads.
Which is updated more often, Calculator Silver or GEMINI Pump System?
Calculator Silver ships an update every 2 months, and GEMINI Pump System every 43 months. Most recently, Calculator Silver was updated on November 1, 2026 and GEMINI Pump System on November 2, 2026.

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