Hidden calc vs PrefixCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hidden calc
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Calculator that allows to hide input values and calculation results while using the app
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
The clearest difference is ads: PrefixCalc at none against Hidden calc's shown. PrefixCalc also leads on iOS requirement (12.0 vs 15.8.3). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Hidden calc | PrefixCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | — |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.8.3 | 12.0 — better |
| Further details — not scored | ||
| Size | 35 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Hideaki Uchikoshi | YONAGARE LAB |
In-app purchases
Hidden calc
No in-app purchases
PrefixCalc
No in-app purchases
Questions
Is Hidden calc free?
Is PrefixCalc free?
Do Hidden calc or PrefixCalc have ads?
Other comparisons
