Comparison

e vs 変数電卓+

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

Head to head
About

e

This scientific calculator supports engineering notation with prefixes like pico, nano, and mega. It offers a history feature to review past calculations and allows editing of formulas for recalculation. The free version has some limitations on history scrolling and saving.

Highlights
  • Scientific notation support
  • Engineering multipliers (p, n, u, m, k, M)
  • History of past calculations
  • Editable formulas for recalculation
  • Unit conversion for engineering prefixes
Features
Read full description

This calculator can be used not only in scientific notation(e.g. 1E-6) but also using engineering multipliers(e.g. p,n,u,m,k,M). By pressing the [ENG] button, the display of calculation result will change. (e.g. 1E-9 or 1n) Calculation results in the past is displayed in the history area. When you tap the formula area , you will be able to edit it. You will be able to re-calculate. Unit that can be entered from the button is p = 1E-12, n = 1E-9, u = 1E-6, m = 1E-3, k = 1E3, M = 1E6. (f = 1E-15 and G = 1E9 is used for display only). iPhone4 can display four lines in history area. iPhone5 can display 9 lines. The main limitations of Free version is as follows. you can not scroll history area. History is not saved when you exit.

About

変数電卓+

Features
Read full description

変数電卓+は、従来の電卓機能に加え、変数機能を持つ計算機アプリです。 【最大の特徴:変数機能】 計算結果を変数として保存し、後の計算で自由に呼び出せる画期的な機能を搭載。 例えば、消費税率を「tax」として保存すれば、いつでも「1000 × tax」のように使えます。 変数には分かりやすいラベルも付けられるので、「月収」「家賃」「光熱費」など、用途に応じた管理が可能です。 【プロフェッショナル仕様の計算機能】 ◆ 基本計算 • 四則演算、パーセント計算、括弧を使った複雑な式 • リアルタイムで計算結果を表示 • 15桁の高精度計算 ◆ 科学計算(関数モード) • 三角関数:sin, cos, tan とその逆関数 • 対数・指数:log, ln, e^x • その他:平方根、べき乗、階乗 • 数学定数:π(円周率)、e(自然対数の底) • メモリ機能:M+, M-, MR, MC 【充実の補助機能】 ◆ 計算履歴(最大100件) • すべての計算を自動記録 • タップで式を再利用 • 日時表示で管理しやすい ◆ お気に入り • よく使う計算式を保存 • ワンタップで呼び出し • カスタム名で整理 ◆ 単位変換(7カテゴリー) • 長さ:メートル、キロメートル、インチ、フィートなど • 重さ:グラム、キログラム、ポンド、オンスなど • 温度:摂氏、華氏、ケルビン • 面積:平方メートル、ヘクタール、エーカーなど • 体積:リットル、ガロン、カップなど • 時間:秒、分、時間、日、週、月、年 • 速度:m/s、km/h、mph ◆ 編集機能 • 計算式を直接編集可能 • カーソル移動で任意の位置を修正 • 計算後も式に戻って編集できる ◆ カスタマイズ • ライト/ダークテーマ • 触覚フィードバック • 多言語対応(日本語・英語)

Screenshots

e4 screens
変数電卓+4 screens

Verdict

The call

The clearest difference is update cadence: 変数電卓+ at daily against e's every 5 months. e's advantage is iOS requirement (6.1 vs 12.0). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

e ships an update every 5 months, 変数電卓+ daily. Both last shipped on October 5, 2026.

Scorecard2 real differences · 8 level
e versus 変数電卓+: the parameters behind the verdict, then further details
Parametere変数電卓+
PriceFreeFree
Rating3.0 (1 ratings) — better—
Positive reviews55.6% of reviews—
Number of ratings1 — better—
Update frequencyEvery 5 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS6.1 — better12.0
Further details — not scored
Size7 MB27 MB
Age rating4+4+
Developere-skett Corp.Takuya Nemoto

In-app purchases

None

e

No in-app purchases

None

変数電卓+

No in-app purchases

Questions

Is e free?
e is free to download, with no in-app purchases.
Is 変数電卓+ free?
変数電卓+ is free to download, with no in-app purchases.
Do e or 変数電卓+ have ads?
Neither e nor 変数電卓+ shows ads.
Which is updated more often, e or 変数電卓+?
e ships an update every 5 months, and 変数電卓+ daily. Most recently, e was updated on October 5, 2026 and 変数電卓+ on October 5, 2026.

Other comparisons