# Undertow: Newsletter Deck — Short reads, chosen by you

> Short reads, chosen by you (iPhone/iPad app by appXfactory.)

- Source: https://appshunter.io/ios/app/undertow-newsletter-deck/id6809211480 (this page in markdown: same URL + `.md`)
- Developer: [appXfactory](https://appshunter.io/developer/1763408126)
- Category: News, Productivity
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 17.0 · 4 MB
- Languages: American English
- Released: 2026-09-19
- Data updated: 2026-10-09

## What is Undertow?

Turn newsletters you choose into a short, sourced reading deck.

Try the bundled sample offline—no account or Gmail connection needed. Read one card at a time. Keep, Skip, Undo, or tap Read deeper for a fuller summary and source details.

A CALMER WAY TO READ
Undertow turns approved newsletter issues into concise, AI-assisted cards. Each card keeps its source details and opens the original issue when a link is available. Keep and Skip shape later decks. When material supports it, cards can connect ideas across your approved sources.

YOUR INBOX, YOUR CHOICE

Sign in with Apple identifies your Undertow account; it doesn't connect Gmail or Apple Mail. Connect Gmail separately on your iPhone with a revocable Google app password.

The app checks likely newsletter headers on device. You review and approve publications before issue text is sent to Undertow. Attachments aren't relayed.

New local connections keep your Gmail address in iPhone preferences and the app password in Keychain; neither is sent to Undertow by that flow. Older server-connected accounts may still have an address and encrypted app password on Undertow. Enabling local relay or disconnecting clears the server-held password; the address may remain until account deletion.

Gmail access is read-only in the app: it can't send, reply, delete, move, label, archive, or mark messages as read.

SUBSCRIPTIONS

The bundled sample deck is free. Personal decks may require a monthly or annual auto-renewing subscription. The purchase screen shows the current price in your local currency, billing period, and any introductory offer available to your account before you confirm. Payment is charged to your Apple Account at confirmation of purchase or after an eligible free trial. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the current period ends. Your account is charged for renewal within 24 hours before the period ends. Manage your subscription in Settings > your name > Subscriptions. Any unused portion of a free trial is forfeited when you purchase a subscription.

Undertow uses Anthropic to generate AI-assisted cards from approved newsletter text. Summaries can make mistakes; check the original issue for important details.

Terms of use: https://undertow.flapp.ist/terms
Privacy policy: https://undertow.flapp.ist/privacy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $12.99 | per month |
| Yearly | $99.99 | per year |


## Is Undertow safe?

Not enough ratings yet to assess Undertow.

## Is Undertow legit?

Undertow: Newsletter Deck appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Undertow is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.2 — 2026-10-06

Version 1.2 makes interrupted Gmail checks easier to recover. See scan status, retry a check, and resume transfers for issues from publications you already approved. New publications still wait for your approval before any issue text is sent to Undertow.

### 1.1 — 2026-09-28

Version 1.1 adds an offline sample deck you can explore without an account or Gmail. Read one card at a time with Keep, Skip, Undo, and Read deeper.

For your own newsletters, guided setup keeps Sign in with Apple separate from the Gmail connection. Your iPhone checks delivery headers first, and you approve publications before their issue text is sent to Undertow. Settings now makes source approvals, connection recovery, and account controls easier to find.

### 1.0 — 2026-09-19

No release notes.

## More apps by appXfactory

- [FlappAI: AI Speaking Tutor](https://appshunter.io/ios/app/flappai-ai-speaking-tutor/id6642682738)
- [5 Steps: Daily Knowledge](https://appshunter.io/ios/app/5-steps-daily-knowledge/id6763940172)
- [Yesterday: One Worthy Moment](https://appshunter.io/ios/app/yesterday-one-worthy-moment/id6763990445)

All apps by appXfactory: https://appshunter.io/developer/1763408126

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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 2026-10-09.*