Comparison

OTenkeyCalc vs TextMath

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Natural Math & Unit Converter

Free

🔧 Utilities

No ratingsView app →

About

OTenkeyCalc

Features

Read full description

Numeric ten keypad calculator that also displays the current temperature and weather at your current location * Weather information source: Apple Weather Service https://developer.apple.com/weatherkit/data-source-attribution/ https://support.apple.com/ja-jp/105038

About

TextMath

Features

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TextMath redefines how calculators work. No need to memorize complex button sequences - just input in natural language and get instant results. 【Core Features】 • Multi-tab management for organized calculations • Natural language input - type "15% of 200" or "100 USD to EUR" • Real-time calculation display with paper-style interface • Smart toolbar with mathematical and currency symbols • Supports basic math, percentages, currency & unit conversion • Automatic data saving and offline operation • Dark mode support 【Perfect For】 • Daily shopping calculations • Travel currency exchange • Work reports and data analysis • Students learning mathematics 【Technical Excellence】 • Precise calculation engine • Optimized performance • Local data storage for privacy • Regular updates Through natural language input and paper-style interface design, TextMath brings calculation back to its essence, becoming an extension of your thinking process. Download TextMath now and experience a different way of calculating.

Screenshots

OTenkeyCalc1 screens

TextMath4 screens

Verdict

The call

The clearest difference is in-app purchases: OTenkeyCalc at none against TextMath's 1. TextMath's advantage is ads (none vs shown) and update cadence (every 5 days vs every 2 weeks). On price, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TextMath sells 1 one-off in-app purchase. OTenkeyCalc asks for nothing beyond the download.

UpkeepUpdate frequency

OTenkeyCalc ships an update every 2 weeks, TextMath every 5 days. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 3 level

OTenkeyCalc versus TextMath: the parameters behind the verdict, then further details
Parameter	OTenkeyCalc	TextMath
Price	Free	Free
Update frequency	Every 2 weeks	Every 5 days — better
Ads	Yes	No — better
In-app purchases	No — better	Yes
Devices	iPhone, iPad	iPhone, iPad, iPod — better
Requires iOS	16.7.10	15.1 — better
Further details — not scored
Size	37 MB	41 MB
Age rating	4+	4+
Developer	Hideaki Uchikoshi	MHOST LTD

In-app purchases

None

OTenkeyCalc

No in-app purchases

1 purchases

TextMath

One-time1

Unlimited Pages$1.99

Questions

Is OTenkeyCalc free?

OTenkeyCalc is free to download, with no in-app purchases.

Is TextMath free?

TextMath is free to download, with in-app purchases available.

Do OTenkeyCalc or TextMath have ads?

OTenkeyCalc shows ads; TextMath does not.

Which is updated more often, OTenkeyCalc or TextMath?

OTenkeyCalc ships an update every 2 weeks, and TextMath every 5 days. Most recently, OTenkeyCalc was updated on October 17, 2026 and TextMath on October 13, 2026.