Calculator Silver vs GEMINI Pump System
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Apple Watch calculator
- Today View Extension
- Printable/emailable history
- Backspace key
- Copy/paste functionality
- Customizable display and themes
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*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.
GEMINI Pump System
Monitor your sump pump system remotely. Check water levels, battery status, and pump operations. Features Local Link technology for offline connectivity.
- Remote water level check
- Battery health monitoring
- Pump status updates
- Local Link offline connectivity
- Wi-Fi restoration notification
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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
Verdict
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
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.
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.
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.
| Parameter | Calculator Silver | GEMINI Pump System |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.4 (5 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 88.9% of reviews — better | 50.0% of reviews |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 2 months — better | Every 43 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 16 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Hannes Sverrisson | WAYNE/SCOTT FETZER COMPANY |
Customer experience
Calculator Silver
GEMINI Pump System
In-app purchases
Calculator Silver
No in-app purchases
GEMINI Pump System
No in-app purchases
Questions
Is Calculator Silver free?
Is GEMINI Pump System free?
Which has better reviews, Calculator Silver or GEMINI Pump System?
Do Calculator Silver or GEMINI Pump System have ads?
Which is updated more often, Calculator Silver or GEMINI Pump System?
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