# Atomic Presence: Audio Proof — Tamper-Proof Voice Recorder

> Tamper-Proof Voice Recorder (iPhone/iPad app by chengche lee.)

- Source: https://appshunter.io/ios/app/atomic-presence-audio-proof/id6759192866 (this page in markdown: same URL + `.md`)
- Developer: [chengche lee](https://appshunter.io/developer/1862790313)
- Category: Utilities, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English, French (France), German (Germany), Indonesian, Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) and 1 more
- Released: 2026-03-03
- Data updated: 2026-08-13
- User reviews in markdown: https://appshunter.io/ios/app/atomic-presence-audio-proof/id6759192866/reviews.md

## What is Atomic Presence?

Atomic Presence: Your Fortress of Digital Truth

When your recorded words matter, Atomic Presence provides cryptographic proof that they are authentic and unaltered. Built for interviewees, journalists, and legal preservation — it gives you the power of technical self-verification.

Key Features:

Cryptographic Hash Chain — Real-time SHA-256 hash sequence encoded into dynamic QR codes, embedded directly into video. Mathematical continuity makes any modification detectable.

On-Device Digital Signatures — Curve25519 via Apple's CryptoKit, key stored in iOS Keychain, ensures non-repudiation of source.

FSK Audio Watermark — Near-ultrasonic (18/19 kHz) FSK signals embedded in audio; even if extracted, integrity can still be verified. Lossless mode embeds an implicit watermark for additional integrity assurance (min 15 seconds).

Sovereign Mode — Front-facing camera recording with live QR code overlay, paired with digital signatures for the strongest video evidence. Thermal and memory monitoring keep long recordings stable.

Built-in Forensic Verifier — Directly verify Level 2 / Level 3 recordings, or import an external video that captured Level 1 QR overlays. Frame-by-frame QR extraction and hash chain recomputation produce a detailed integrity report.

Four Professional Tiers:

Level 0 — Screensaver: basic visual presence proof with customizable logo text (1–6 chars).

Level 1 — Alert: Picture-in-picture hash chain for external-device capture; verify integrity by importing the external recording afterward.

Level 2 — Witness: High-quality audio recording with FSK watermark embedding. Lossless (ALAC) mode provides implicit watermark verification (min 15 s).

Level 3 — Sovereign: Front-facing recording with live QR overlay, digital signature and file checksum — the strongest preservation tier.

Evidence Management
Star important recordings, add notes, share via AirDrop or the Files app. Auto-stop timer (30 min – 3 hours) prevents unintended long recordings. All evidence stored locally and accessible via the iOS Files app.

Personalization
Three visual themes — Terminal (cyberpunk green), Natural Light, Natural Dark — choose what fits your environment.

Privacy-First
100% On-Device: hashing, signing, and media processing all happen locally.
No Data Collection: no recordings or identity data are collected, stored, or transmitted.
Offline-Capable: works without any network connection.

Capture verifiable truth. Make your evidence trustworthy.

----- cross-promo (auto-generated; do not edit) -----
More from the developer: Auditory Companion · Afterglow · English N+1 · Gantt Planet — Search «ChengChe Lee» on the App Store.


## Version history (last 5 releases)

### 1.3.1 — 2026-08-11

Maintenance update — fixed a few outdated links.

### 1.3 — 2026-06-19

v1.3 — Brand-new More-from-Developer page and polished About hero.

### 1.2 — 2026-05-08

v1.2 — Now in 11 languages, including German, Spanish, and Brazilian Portuguese. Hardware keyboard shortcuts on iPad and Mac.

### 1.1 — 2026-04-10

What's New in v1.1

• Japanese language support — full localization across all screens
• Verification grading system with contrast-enhanced QR detection for more reliable evidence analysis
• Deterministic progress indicators replace spinners during evidence processing — see exactly what's happening
• Level 3 thermal and memory monitoring with auto-stop warnings for long recording sessions
• Dropped frame detection and disk space safety monitor prevent data loss
• Configurable auto-stop timers (30 min – 3 hours) for Level 2 and Level 3 recordings
• Evidence package import/export — transfer and verify evidence across devices
• Camera warmup UI hints for first-time Level 3 users
• Feature icons on Level 2 and Level 3 idle screens for clearer navigation
• Faster verification — removed artificial delays, optimized QR extraction
• Fixed PiP ghost QR overlay remaining after Level 1 deactivation
• Performance improvements: pre-warmed camera encoder and QR cache reduce activation lag

### 1.0 — 2026-03-04

No release notes.

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## More apps by chengche lee

- [Kana Juku: Kana Keyboard](https://appshunter.io/ios/app/kana-juku-kana-keyboard/id6756785942)
- [English Plus One](https://appshunter.io/ios/app/english-plus-one/id6757358263)
- [Gantt Planet: Habit Tracker](https://appshunter.io/ios/app/gantt-planet-habit-tracker/id6757654373)
- [Auditory Companion: Sleep](https://appshunter.io/ios/app/auditory-companion-sleep/id6759191303)
- [Python Dimensions: Quiz Bank](https://appshunter.io/ios/app/python-dimensions-quiz-bank/id6759192089)

All apps by chengche lee: https://appshunter.io/developer/1862790313

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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 2026-08-13.*