Comparison

Adam's Calc vs OTenkeyCalc

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

Head to head

Adam's Calc

Help remember answers

Free

🔧 Utilities

★ 5.02 ratingsView app →

About

Adam's Calc

A utility calculator that adds memory functionality to standard calculations. Designed to make your device's calculator more helpful by remembering previous results.

Highlights

Memory function for calculations
Enhanced utility calculator
Intuitive design
Remembers previous results

Features

Read full description

Adam's Calc is a utility calculator designed by rdConcepts. This design is intended to help make the standard calculator more useful by building some "memory" into the device. Inspiration -> Donald Norman.

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

Screenshots

Adam's Calc4 screens

OTenkeyCalc1 screens

Verdict

The call

The clearest difference is in-app purchases: OTenkeyCalc at none against Adam's Calc's 1. OTenkeyCalc also leads on update cadence (every 2 weeks vs every 4 months). On price, ads, 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. Adam's Calc sells 1 one-off in-app purchase. OTenkeyCalc asks for nothing beyond the download.

UpkeepUpdate frequency

Adam's Calc ships an update every 4 months, OTenkeyCalc every 2 weeks. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

Scorecard2 real differences · 7 level

Adam's Calc versus OTenkeyCalc: the parameters behind the verdict, then further details
Parameter	Adam's Calc	OTenkeyCalc
Price	Free	Free
Rating	5.0 (2 ratings) — better	—
Number of ratings	2 — better	—
Update frequency	Every 4 months	Every 2 weeks — better
Ads	Yes	Yes
In-app purchases	Yes	No — better
Monetization	Free with in-app purchases	—
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	15.0 — better	16.7.10
Further details — not scored
Size	5 MB	37 MB
Age rating	4+	4+
Developer	RD Concepts	Hideaki Uchikoshi

In-app purchases

1 purchases

Adam's Calc

One-time1

Remove Advertising$2.99

None

OTenkeyCalc

No in-app purchases

Questions

Is Adam's Calc free?

Adam's Calc is free to download, with in-app purchases available.

Is OTenkeyCalc free?

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

Do Adam's Calc or OTenkeyCalc have ads?

Both Adam's Calc and OTenkeyCalc show ads.

Which is updated more often, Adam's Calc or OTenkeyCalc?

Adam's Calc ships an update every 4 months, and OTenkeyCalc every 2 weeks. Most recently, Adam's Calc was updated on November 3, 2026 and OTenkeyCalc on November 8, 2026.