# Sigmy — Private on-device AI & PDFs

> Private on-device AI & PDFs (iPhone/iPad app by SIGMY GROUP PTY LTD.)

- Source: https://appshunter.io/ios/app/sigmy/id6762498646 (this page in markdown: same URL + `.md`)
- Developer: [SIGMY GROUP PTY LTD](https://appshunter.io/developer/1894404124)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3.2 GB
- Languages: English
- Released: 2026-05-07
- Data updated: 2026-09-28
- User reviews in markdown: https://appshunter.io/ios/app/sigmy/id6762498646/reviews.md

## What is Sigmy?

Sigmy is a fully on-device AI assistant. The language model, document search, and every piece of private text stay on your iPhone or iPad. No cloud. No account. No tracking. No training on your data. Ever.

WHY SIGMY IS DIFFERENT
• Runs a Google Gemma model locally on your device — no API keys, no subscriptions to external AI services, and no network round-trips that can leak your content.
• Works offline, on a plane, in a tunnel, or in a sensitive workplace where cloud AI is banned.
• Your documents, chats, and questions never leave your device. We cannot read them and neither can anyone else.

WHAT YOU CAN DO
• Ask questions about your PDFs, Word docs, text files, Markdown, and scanned images — every answer cites a tappable source passage.
• Import documents by tapping +, scanning with the camera, capturing text from photos, pasting images, or sharing from any other app.
• Compare two or more documents side-by-side — "what's different between these contracts?", "which proposal has better terms?".
• See comparison answers as clean tables when the model formats them that way.
• Tap suggested follow-up questions after each answer to dig deeper with one tap.
• Extract events from any document straight to your Calendar — meeting dates, deadlines, travel itineraries.
• Hands-free mode: have Sigmy read answers aloud in your choice of voice — fully on-device.
• Dictate questions by voice and export chats as PDF, Markdown, plain text, RTF, or email.
• Search your chat history to find past conversations instantly.
• Full-text search across every document you've imported, with semantic ranking that understands what you meant.
• Quick-prompt templates for executive summaries, action items, study outlines, and timelines.

PRIVACY BY DESIGN
• Optional Face ID / Touch ID unlock for the whole app.
• Optional AES-GCM encryption of the document index at rest, sealed whenever you background the app.
• Privacy manifest declares every iOS API we touch and why.
• PII detection warns you before indexing credit card numbers or other sensitive identifiers.

FREE TRIAL — 7 DAYS OF EVERYTHING
Every new install gets a 7-day free trial with full Pro features: unlimited documents, extended memory window, and all advanced tools. No credit card required.

SIGMY PRO
After the trial, Sigmy Pro unlocks:
• Unlimited document imports and queries
• Extended memory window for long files
• All advanced tools and future Pro features at no extra cost

THREE WAYS TO SUBSCRIBE
• Pro Monthly — $5.99/month after a 7-day free trial
• Pro Yearly — $39.99/year after a 14-day free trial (saves ~50% vs monthly)
• Lifetime Pro — one-time $79.99, permanent access, no renewals

SUPPORTED DOCUMENT TYPES
PDF, Word (.docx), plain text (.txt), Markdown (.md), Rich Text (.rtf), HTML, CSV, and images containing text (via on-device OCR).

DEVICE REQUIREMENTS
iPhone or iPad with sufficient RAM for on-device AI. Sigmy adapts memory settings automatically to your device. The language model (~3.4 GB) is included in the app — no separate download after install. Works fully offline once installed.

—
SUBSCRIPTION TERMS
Sigmy Pro is an auto-renewable subscription.
• Pro Monthly: $5.99 per month after a 7-day free trial.
• Pro Yearly: $39.99 per year after a 14-day free trial.
• Lifetime Pro: one-time $79.99 non-renewing purchase.
Payment will be charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription in Settings → Apple Account → Subscriptions.
Privacy Policy: https://www.sigmygroup.com/privacy
Terms of Use: https://www.sigmygroup.com/terms

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Yearly | $39.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $79.99 | one-time |



## Version history (last 3 releases)

### 1.0.4 — 2026-06-11

What's new in 1.0.4

• Table answers. When Sigmy compares documents or lists structured data, pipe tables now render as clean, scrollable tables instead of raw text.
• Chat history search. Find any past conversation from the Chats list with the new search bar.
• Faster document search when you refine or repeat similar questions.
• Refreshed chat experience from 1.0.3: lighter answer layout, smoother streaming, time-of-day greeting, gradient send button, and one-tap follow-up suggestions after each reply.
• Code blocks now appear in tidy cards with a one-tap Copy button.
• Fixed an issue where hidden model markers could briefly appear in streamed replies.
• General polish across Chat and Documents.

Everything still runs entirely on your device. Nothing leaves your iPhone or iPad.

### 1.0.2 — 2026-05-17

What's new in 1.0.2

• Smarter memory handling. Sigmy now reads your device's available RAM at launch and picks safe defaults automatically. iPhone 13 / 14 / 15 base models get a tuned context window that prevents out-of-memory crashes during long PDF chats. iPhone 16 family and iPad Pro / Air (M-series) keep the full 4K context window.

• Capture Text and Document Scanner no longer crash. On 6 GB iPhones the AI model now briefly unloads while the camera is open and reloads automatically afterwards. You'll see a short "Loading model…" indicator before your next prompt — that's normal.

• Your settings stick. Memory window, Response length, and Creativity in Settings → Generation are now saved across app launches.

• iPad Gen 9 / Gen 10 compatibility notice. These iPads have less RAM than Sigmy needs for reliable performance, so the app now shows a one-time heads-up on first launch with an Apple refund link, just in case.

• Stability fixes for very long conversations and large PDFs.

Thanks for using Sigmy. Email info@sigmygroup.com if anything looks off — we read every message.

### 1.0 — 2026-05-07

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 2026-09-28.*