BigCalcMini vs Smart Adding Machine
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
BigCalcMini
This calculator app features large buttons and a clear, bright display for easy input and visibility, even outdoors. It calculates equations in the order they are entered, unlike some other mobile calculators that prioritize operator precedence.
- Large, easy-to-press buttons
- Big, bright display for outdoor visibility
- Input order calculation (not operator precedence)
- Audible key press feedback
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The button is large, and the display of the figure is also large. It is easy to input of the touch pad because the button is large. Moreover, it is easy for a bright environment such as the outdoors to see the content of the screen in a big character and a bright arrangement of color. It is sounded that the key pushed. The operator of this calculator is calculated in order putting it like a calculator of Windows . The answer is nine if it pushes in order of 1+2*3. (The calculator of iphone and MacOSX is calculated in consideration of the priority of operator. It is 7 if it pushes in order of 1+2*3)
Smart Adding Machine
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This app has a numeric keyboard. It may not always be visible. If it is not visible, pressing the input button that has the text 'Insert an Amount or ...', will cause one to appear. If you want to hide it, select the button on the left titled 'Hide KB'. The Adding Machine contains a visual tape with two columns of numbers. The left is the amount you keyed. The right column has in a '1' which is the count. The system puts in a '1' for you. As you add items, the tape grows. The last item is always followed by an empty item colored red. This color red is important because it indicates where your next entry will be placed!!! After entering a number, press the 'Save' button. If this is your first entry, two items will appear on the tape. The first one will contain the number you keyed. The second will be red with the amount showing: 0.00 and a count showing 1. This pattern will continue as you add items On the left side of the screen are 11 buttons in a column. The first six are for moving the red color - but not its contents. This allows for the correction of errors. The first two are: first - go to tape start & second to tape end (red item). The second two go up one item and down one item on the tape. The last of the group switch between amount & count - usually used to change the count from 1. There a 4 named buttons the effect the tape: Clear, Insert (an empty row where the red is, Delete(the row that a red item) and Hide KB. The keyboard has no minus sign. There is a slider button that can be used to cause an number to be negative. It is red for emphasis At least 50 items can be entered. The tape can be scrolled by using your finger to see the entire tape. At the very top of the screen is a 'Help' chevron that switches to a page of help text.
Screenshots
Verdict
The clearest difference is update cadence: Smart Adding Machine at every 3 weeks against BigCalcMini's every 2 months. BigCalcMini's advantage is price ($0.99 vs $3.99) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
BigCalcMini costs $0.99 and Smart Adding Machine $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
BigCalcMini ships an update every 2 months, Smart Adding Machine every 3 weeks. Both last shipped on September 9, 2026.
| Parameter | BigCalcMini | Smart Adding Machine |
|---|---|---|
| Price | $0.99 โ better | $3.99 |
| Positive reviews | 75.0% of reviews | โ |
| Update frequency | Every 2 months | Every 3 weeks โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | โ |
| Devices | iPhone, iPod | iPhone, iPad, Mac โ better |
| Requires iOS | 13.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 1 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | r2r660cc | Harry Detrick |
In-app purchases
BigCalcMini
No in-app purchases
Smart Adding Machine
No in-app purchases
Questions
Is BigCalcMini free?
Is Smart Adding Machine free?
Do BigCalcMini or Smart Adding Machine have ads?
Which is updated more often, BigCalcMini or Smart Adding Machine?
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