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Verbform drills the 200 most frequent English irregular verbs, five minutes a day. It teaches all three forms separately — base, past simple, past participle (for example go / went / gone) — using fill-in-the-blank sentences rather than abstract tables, and schedules reviews with adaptive spaced repetition (an SM-2 algorithm). The top 50 verbs are free; Pro unlocks verbs 51–200, detail cards, and a Home-Screen widget.

The most effective evidence-based method is spaced repetition — reviewing each verb at increasing intervals, just before you'd forget it. This leverages the 'spacing effect,' one of the most replicated findings in learning research. Practising each form in sentence context, rather than as an isolated list, also strengthens recall. Verbform automates this with a per-verb SM-2 schedule, so verbs you struggle with come back sooner and ones you've mastered recede.

English has roughly 200 irregular verbs in common use (estimates vary by corpus and how rare forms are counted). Verbform covers 200, frequency-ranked from a contemporary English corpus — from everyday verbs like be, have, go, and get down to rare ones like forsake and smite.

Base, past simple, and past participle — for example go / went / gone, or take / took / taken. Verbform tracks each form separately, so getting 'went' right doesn't make the app assume you know 'gone.'

Yes. Verbform's free tier includes the top 50 irregular verbs, the daily session, the streak counter, and the placement quiz. It works fully offline — the entire curriculum ships inside the app.

Verbform is the same app, rewritten and renamed. If you had Irregular Verbs Training installed, the App Store update from v1.x to v2.0 lands automatically (same App Store record, same bundle, same purchase history). On first launch, Verbform reads your verb progress out of the old data store and migrates it into the new structure. You also get lifetime Pro access at no charge as a thank-you for sticking with the app since 2018.

If you've since uninstalled the original app, the migration won't find any progress to restore — but you can sign up for the free tier and the placement quiz will get you re-seeded in five minutes.

Each English irregular verb has three forms — base, past simple, past participle. Verbform shows you a fill-in-the-blank sentence and asks you to pick the form that fits. Tense markers and perfect-tense auxiliaries do the disambiguation, so the grammar (not a hint label) tells you which form is right.

Each form is tracked separately. Mastering "went" doesn't fool the app into thinking you know "gone".

They're frequency-ranked from a contemporary English corpus, then filtered to actual irregulars. Tier 1 (the top 50) covers the verbs you'll meet several times in any normal English paragraph — be, have, do, say, go, get, make, know, take, see, and so on. Tiers 2–4 fan out from there to the rare ones (forsake, cleave, smite).

Complete a daily session and the streak ticks up by one. Miss a day and it resets to zero. There's no streak-freeze, no streak-saver — it's a single honest counter. The streak is the only gamification.

Yes. The full curriculum, all 200 verbs, all sentences, and the SRS scheduler ship inside the app bundle. The only network calls are anonymous analytics events (Firebase, batched in the background) and StoreKit subscription validation. None of those affect whether you can practice.

Open iOS Settings → tap your name → Subscriptions → Verbform → Cancel Subscription. Or inside the app: Settings → Manage Subscription, which deep-links to the same place. Cancellation takes effect at the end of the current billing period.

Settings → Data → Reset all progress wipes every verb's progress, streak, and entitlement state from your device. Because the app has no server, this is total deletion. Uninstalling the app does the same thing.

Anonymous usage events (which screens you visit, which paywall variant you saw, when sessions start/finish) and crash reports. Everything is unattributed: no IDFA, no IDFV, no email, no name, no precise location. The full list is on the Privacy Policy page.

Notifications are useful — but only when you set the time. Verbform asks you for a reminder time during onboarding; you can change or disable it any time in Settings → Daily Practice. If you deny the notification permission entirely, the rest of the app keeps working.

[email protected]. Bug reports, feature requests, content corrections (a wrong example sentence, an awkward IPA), all welcome.