Comparison

iDev Tango vs Lockeigo

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

Head to head
About

iDev Tango

Features
Read full description

iDev Tangoは、AIを活用した次世代の単語帳アプリです。アプリエンジニアが技術用語を効率的に学習できるよう、最新のAI技術と直感的なUIを組み合わせました。 ・AI定義作成機能 AI定義作成機能により、技術用語の意味を瞬時に理解できます。わからない単語を入力するだけで、専門家レベルの説明を自動作成。iOS、Swift、SwiftUIの専門用語も、AIがわかりやすく解説します。 ・フラッシュカードで、効率的に学習 スワイプ操作で直感的に学習できるフラッシュカード機能。理解度に応じた復習システムで、覚えにくい用語も効率的に学習できます。 ・テーマ別整理で、体系的な学習 フォルダ機能で、テーマ別に単語を整理。iOS開発、Swift言語、SwiftUIなど、学習したい分野ごとに単語を分類できます。自分だけのカスタム単語帳を作成し、効率的に学習を進めましょう。 ・オフラインでも学習可能 一度ダウンロードした用語は、オフライン環境でも学習できます。通勤中や移動中など、インターネット接続がない環境でも、いつでもどこでも学習を続けられます。 こんな方におすすめ! ・iOSアプリ開発を学んでいる方 ・SwiftやSwiftUIの技術用語を覚えたい方 ・エンジニアとしてスキルアップしたい方 ・効率的な学習方法を探している方 ・技術書を読む際の用語集として活用したい方 iDev Tangoで技術用語に強いiOSエンジニアに!

About

Lockeigo

Enhance your English vocabulary by learning new expressions directly from your iPhone's lock screen. Create custom flashcards, organize them into folders, and receive personalized review reminders. Unlock advanced features and customization options with a subscription.

Highlights
  • Create custom English flashcards
  • Organize vocabulary into folders
  • Display cards in Live Activities and widgets
  • Personalized review reminders
  • Customizable themes and fonts
  • Search words, meanings, and examples
Features
Read full description

Lockeigo is an iPhone vocabulary app that helps you recall useful English expressions from your Lock Screen. KEY FEATURES • Create cards with English, a translation, and an optional example • Search words, meanings, and examples • Organize folders and export or import JSON • Show one to four cards in Live Activities and widgets • Sort reviews with Again and Got It • Choose themes, fonts, text sizes, and presentation styles • Set optional review reminders Lockeigo Plus unlocks unlimited cards, nested folders, more themes and fonts, custom colors, longer review sessions, detailed insights, and custom reminders. Monthly and annual plans unlock the same Plus features. Price, duration, and any eligible trial are shown before purchase. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends and can be managed in Apple Account settings. No account or cloud sync is required. Cards and learning history stay on your device. Only when you explicitly start Lock Screen display, the lesson data, display settings, ActivityKit token, and App Attest information required for the Live Activity are processed through Microsoft Azure Japan East and APNs. Free users may see ads in eligible app areas, never on the Lock Screen, in Live Activities, Dynamic Island, widgets, notifications, review cards, or Plus screens. Support: https://lockeigo-public.pages.dev/support.html Privacy: https://lockeigo-public.pages.dev/privacy.html Terms: https://lockeigo-public.pages.dev/terms.html Seller: https://lockeigo-public.pages.dev/commercial-transactions.html Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

iDev Tango4 screens
Lockeigo4 screens

Verdict

The call

iDev Tango and Lockeigo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

ScorecardNo meaningful differences
iDev Tango versus Lockeigo: the parameters behind the verdict, then further details
ParameteriDev TangoLockeigo
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 2 daysEvery 2 days
AdsYesYes
In-app purchasesNoNo
Monetization—Free with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size5 MB22 MB
Age rating4+4+
Developershohei yukawayohei ueda

In-app purchases

None

iDev Tango

No in-app purchases

None

Lockeigo

No in-app purchases

Questions

Is iDev Tango free?
iDev Tango is free to download, with no in-app purchases.
Is Lockeigo free?
Lockeigo is free to download, with no in-app purchases.
Do iDev Tango or Lockeigo have ads?
Both iDev Tango and Lockeigo show ads.
Which is updated more often, iDev Tango or Lockeigo?
iDev Tango ships an update every 2 days, and Lockeigo every 2 days. Most recently, iDev Tango was updated on October 25, 2026 and Lockeigo on October 24, 2026.

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