Kitten's Calc vs PrefixCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kitten's Calc
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◆ A casual calculator with fun sounds. ◆ Choose from three screen designs. ◆ The buttons can be set to make sounds like cat meows or piano notes. ◆ Numbers can be typed out quickly, so it's very comfortable to use.
PrefixCalc
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This calculator supports Metric‑prefix such as kilo and giga. The calculator supports quetta (10^30) and quecto (10^-30), which were added in 2022. Main Functions ・Support for arithmetic operations (+ - ×÷) ・Results converted to Japanese numerals for display ・Delete one character at a time with the "DEL" button Press and hold to delete all ・Press and hold to copy calculation formulas and results English (Short scale, Long scale) and Chinese numerals can also be selected. ・Calculations that include prefixes such as 2M+1k, 2M×1μ, etc. Note: ・Very large numbers that exceed 200 digits may be rounded off for display and calculation purposes. Please note this when precision is required. ・Short scale and Long scale are currently supported up to 10^198. ・Kanji notation is supported up to 10^72. If it is greater than the number, it will be displayed in Arabic numerals.
Screenshots
Verdict
Kitten's Calc and PrefixCalc are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Kitten's Calc | PrefixCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 44 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.1 — better | 12.0 |
| Further details — not scored | ||
| Size | 31 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Yoji Munakata | YONAGARE LAB |
In-app purchases
Kitten's Calc
No in-app purchases
PrefixCalc
No in-app purchases
Questions
Is Kitten's Calc free?
Is PrefixCalc free?
Do Kitten's Calc or PrefixCalc have ads?
Other comparisons
