# Jack Vocs

> Jack Vocs (iPhone/iPad app by 丹 邓.)

- Source: https://appshunter.io/ios/app/jack-vocs/id6799673200 (this page in markdown: same URL + `.md`)
- Developer: [丹 邓](https://appshunter.io/developer/6793760797)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 50 MB
- Languages: American English
- Released: 2026-09-13
- Data updated: 2026-10-14

## What is Jack Vocs?

JACK Vocs was inspired by a boy, Air Jack. "Air" comes from Air Jordan, the sneakers named after Michael Jordan — Jack loves basketball, and Jordan is his GOAT (greatest of all time).

Like many friends from non-English-speaking countries who want English as their second language (ESL), Jack passed Cambridge KET at nine and is now preparing for PET. As he goes deeper, words become the crux of his English journey — and its greatest obstacle: remember a few and he steps forward; forget them and he slips back.

Forgetting is inevitable; it begins the very moment study ends. What JACK Vocs does is insert the right intervals into that forgetting and review words in time (we call it "repetition"), so Jack always takes one steady step forward.

JACK Vocs is built on the flashcard system¹, like the letter cards from Jack's kindergarten, or the Flash Cards so many English teachers ask students to make. We craft these cards in complete sets, dictionary by dictionary — they are the heart of the app. Jack can swipe each card with ease: left to remember, right to forget; native-voice audio for words and sentences is a tap away, meaning and word-root structure are clear at a glance, and tapping any word in an example opens its own card, so lookups and learning chain on without end.

The improved SM-2 spaced-repetition algorithm², tailored to the Ebbinghaus forgetting curve, delivers precise review reminders. Jack can strike while the iron is hot and review right away, or set a word aside and keep learning new ones. Words set aside are quietly slipped back into the learning flow at the right moment, marked with a lightning bolt in the card's corner. It never interrupts Jack's current rhythm; instead it weaves "repetition" silently into the backdrop of natural forgetting.

JACK Vocs has no gamification and no entertainment gimmicks; it stays faithful to one goal — memorizing words — helping every English learner through intensely focused interaction and complete, scientific content. It ships with vocabularies for every stage, from beginner KET to advanced IELTS and TOEFL: around 20,500 words and nearly 45,000 example sentences. Small numbers for a language, yet aligned to the level of an educated native speaker — exactly what a learner like Jack truly needs: to become a fluent speaker of English as a second language. To that end, powered by today's great AI revolution, JACK Vocs derives every example sentence from the words in its vocabulary, forming a self-contained little world of English inside the app.

Jack immerses himself in it every day and gains a little each time, and he's glad to share it with English learners and enthusiasts around the world.

Welcome to download JACK Vocs — we wish you a pleasant experience and rewarding learning!

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://jackvocs.res.airjack.top/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 英语 (美国) JackVocs Monthly Pro | $0.59 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| JackVocs Lifetime Pro | $12.99 | one-time |


## Is Jack Vocs safe?

Not enough ratings yet to assess Jack Vocs.

## Is Jack Vocs legit?

Jack Vocs has limited verification signals. The AppsHunter Legitimacy Score for Jack Vocs is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.0.2 — 2026-09-19

[J.A.C.K VOCS V1.0.2 What's New]

1. Bi-color Curve Visualization: Upgraded forgetting curve chart with bi-color proportion nodes to distinguish overdue vs. upcoming reviews.
2. Bug fixes and performance improvements.

### 1.0.1 — 2026-09-16

[J.A.C.K VOCS V1.0.1 What's New]

1. In-Car Audio Review: Added support for Apple CarPlay media systems with full steering wheel and dashboard controls.
2. Hands-Free Audio Loop: New "Loop Listening" mode for continuous vocabulary and example sentence audio playback with position memory.
3. Refined Audio Experience: Precise pause timing between words, seamless previous-word history tracking, and zero impact on your Spaced Repetition memory curve.

### 1.0 — 2026-09-13

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-14.*