Comparison

XLII vs Bitcoin Mempool

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

Head to head
About

XLII

Features
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XLII - Explore Numbers and Numerals help you learn about, discover, and explore number and numerals from around the world, ranging from familiar Roman numerals to the ancient Kharoṣṭhī script. You even can use your camera to scan numbers and convert them to an interesting output format.  To achieve full immersion, use the XLII Clock widget to display the current date and time in a number format of your choosing directly in your Home Screen. XLII - Explore Numbers and Numerals supports: - Arabic numerals (naturally) - Roman numerals - Japanese numerals (including financial notation) - Babylonian Cuneiform numerals (base 60) - Aegean numerals (Linear B script) - Chinese counting rods (籌) - Egyptian Hieroglyphs - Suzhou numbers (蘇州碼子) - Phoenician numbers - Kharoṣṭhī numerals - Brahmi numerals - Glagolitic numerals - Cyrillic numerals - Ge'ez numbers - Sundanese numbers - Tibetan numbers - Mongolian numbers - hexadecimal, binary, octal, vigesimal, etc. - spell-out notation for many languages Most formats are also accepted as input, e.g. you can convert from Roman to Cyrillic, from Ge'ez to binary, or from Japanese to Babylonian. Some (ancient) formats don't support large numbers.

About

Bitcoin Mempool

Features
Read full description

Bitcoin memory pool visualization tool, which displays the pending transactions in the Bitcoin network in real time through blocks of different colors and sizes. It supports transaction details viewing and dynamic display of handling fees.

Screenshots

XLII3 screens
Bitcoin Mempool3 screens

Verdict

The call

The clearest difference is price: XLII at Free against Bitcoin Mempool's $0.99. Bitcoin Mempool's advantage is update cadence (every 3 weeks vs every 12 months) and iOS requirement (12.0 vs 17.6). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

XLII is free to download; Bitcoin Mempool costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

XLII ships an update every 12 months, Bitcoin Mempool every 3 weeks. The most recent releases landed on October 11, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 3 level
XLII versus Bitcoin Mempool: the parameters behind the verdict, then further details
ParameterXLIIBitcoin Mempool
PriceFree — better$0.99
Update frequencyEvery 12 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.612.0 — better
Further details — not scored
Size15 MB29 MB
Age rating4+4+
Developertelethon k.k.艳华 赵

In-app purchases

None

XLII

No in-app purchases

None

Bitcoin Mempool

No in-app purchases

Questions

Is XLII free?
XLII is free to download, with no in-app purchases.
Is Bitcoin Mempool free?
Bitcoin Mempool costs $0.99, with no in-app purchases.
Do XLII or Bitcoin Mempool have ads?
Neither XLII nor Bitcoin Mempool shows ads.
Which is updated more often, XLII or Bitcoin Mempool?
XLII ships an update every 12 months, and Bitcoin Mempool every 3 weeks. Most recently, XLII was updated on October 11, 2026 and Bitcoin Mempool on September 29, 2026.

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