Learning and careers decision
KoriQuest
A competent developer can build and maintain a useful iOS replacement (spaced repetition + simple pronunciation checks) within a few months of effort using existing open-source prior art; keep paying if you value the app's content breadth, polish, and App Store presence.
View on the App Store↗$14.99/mo
$180/yr
Read off the official pricing page.
$100one-off160 h to build
$0/mo3 h/mo upkeep
On cash alone, building overtakes the subscription at 1 seat.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All KoriQuest alternatives, with the arithmetic →
What a replacement has to do
- Study new items, review via spaced-repetition, practice pronunciation with audio recording/comparison, and track progress locally.
What it still won’t have
- Large existing userbase and brand recognition
- Polished multi-language content pipeline and ongoing lesson creation
- Cross-device cloud sync and backend analytics unless implemented
- App Store marketing and reviews history
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 1 seat.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build an iOS app using SwiftUI + Combine, Core Data (or SQLite) for local-first storage, AVFoundation for playback and recording, and StoreKit for subscriptions. In scope: SM-2 spaced-repetition scheduling, lesson/flashcard CRUD, review session UI, native slow/normal audio playback, record-and-compare flow returning a basic similarity score, offline-first persistence, App Store subscription handling, error handling, and unit tests for scheduling and audio flows. Out of scope: multi-language content pipeline, paid content creation, large-scale cloud sync (only provide optional CloudKit stub), and analytics dashboards. Include CI tests, basic accessibility tags, and clear receipt-restore flows.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 4 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score67
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 4
Every page the run actually retrieved.
- official productKoriQuest on the App Store
- official pricingKoriQuest pricing on the App Store
- open sourcemengxi-ream/read-frog
- open sourceumlx5h/LLPlayer
Integrity checks
What held up, and what did not.
