calculator DUO vs Trigintuple Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
calculator DUO
This utility app offers a modern calculator with a visual history feature, eliminating the need to memorize previous calculations. It also includes a comprehensive unit converter and a tip calculator that bases tips on pre-tax amounts.
- Visual history calculator (RESULT SHELF™)
- Unit converter
- Tip calculator (pre-tax)
- Distraction-free design
- Precise and efficient
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A scientific calculator with history, memory and a keypad made for one hand. Save useful answers and tap to use them again on iPhone and iPad. WITHIN THUMB REACH Move and resize the left- or right-hand keypad to suit your grip. KEEP THE ANSWERS YOU NEED Save useful results on a visual shelf. Tap to reuse them, recall your last answer, or search your calculation history and mark favorites. CORRECT INPUT WITH CONFIDENCE Swipe to delete a digit or function. The deleted content stays visible until your next input; tap the return button to undo the deletion. FROM EVERYDAY TO SCIENTIFIC Use arithmetic, percentages, powers, roots, logarithms and trigonometric functions. Long-press a result for a large display, with adjustable text, color, font and size. MAKE IT YOURS Five themes, optional digit grouping and an interface in 50 languages. No account is required. Expressions, saved results and calculation history are stored on your device. DATES AND TIME, TOO Find the time between two dates, add or subtract days and hours, and calculate across time zones. The free app may show banner ads. Remove Ads is an optional one-time purchase, with purchase restoration through the same Apple Account.
Trigintuple Calc
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Display 30 calculators and perform calculations with each one.
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Verdict
The clearest difference is in-app purchases: Trigintuple Calc at none against calculator DUO's 1. On price, update cadence, ads and device support 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
Both are free to download. calculator DUO sells 1 one-off in-app purchase. Trigintuple Calc asks for nothing beyond the download.
calculator DUO ships an update every 10 days, Trigintuple Calc every 2 weeks. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.
| Parameter | calculator DUO | Trigintuple Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 10 days — better | Every 2 weeks |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.5 | 15.8.3 — better |
| Further details — not scored | ||
| Size | 11 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Wenbin lei | Hideaki Uchikoshi |
In-app purchases
calculator DUO
- Remove Ads$7.99
Trigintuple Calc
No in-app purchases
Questions
Is calculator DUO free?
Is Trigintuple Calc free?
Do calculator DUO or Trigintuple Calc have ads?
Which is updated more often, calculator DUO or Trigintuple Calc?
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