Shield vs Nasu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Shield
This utility app uses AI to filter and categorize SMS messages, blocking spam and organizing your inbox. It offers customizable filters and a privacy-first approach to keep your communications clean and secure.
- AI-driven spam filtering
- Privacy-first data handling
- Unlimited customizable filters
- Intelligent message categorization
- Easy setup and user-friendly interface
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Shield: AI-Powered SMS Filter & Categorizer Description: Take control of your SMS inbox with Shield, the ultimate app for filtering and categorizing your messages. Powered by advanced AI technology, Shield keeps your messages organized, secure, and spam-free, ensuring you only see what matters. Key Features: • AI-Driven Filtering: Say goodbye to unwanted messages. Shield uses cutting-edge AI to automatically filter out spam and unwanted texts, keeping your inbox clean and clutter-free. • Privacy First: Your data is your business. Shield ensures your messages stay private and secure, with no data stored or shared. • Customizable Filters: Have specific needs? Shield lets you add unlimited customizable filters to tailor your SMS experience to your liking. • Intelligent Categorization: Organize your messages effortlessly. Shield automatically categorizes your SMS into different folders, making it easier to find important messages quickly. • Easy Setup: Get started in minutes. Shield’s user-friendly interface makes it simple to set up and start protecting your inbox. Why Choose Shield? • Enhanced Security: Protect your personal information with our privacy-first approach. • Seamless Experience: Enjoy a smooth and intuitive user experience with Shield’s streamlined design. • Stay Focused: With spam out of the way, you can concentrate on the messages that matter most. Shield is the perfect companion for anyone looking to enhance their SMS experience with smart, secure, and customizable filtering and categorizing. Download Shield today and take the first step towards a cleaner, more organized inbox. Download Shield now and reclaim your inbox!
Nasu
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Nasu transcribes private-practice sessions on your iPhone. The audio never leaves it. There is no account, no upload, and nothing to sign. Transcription, speaker labels, and SOAP/DAP drafts all run on the device. A cloud scribe's BAA is a promise about what a vendor will do with your clients' words. On-device processing is the absence of that problem. WHAT YOU GET Nasu transcribes on this device. Recording and export are never gated. • Free — record any session. The first three transcripts are complete; after that, new transcripts stop at ten minutes. • Nasu Unlock (one-time) — unlimited transcript length, speaker labels, and custom vocabulary. If you bought Nasu when it was a paid app, you already have this. • Nasu Pro (optional subscription) — everything in Unlock, plus SOAP and DAP notes drafted on this device. You review every note. 7-day free trial, then monthly or yearly; cancel any time in your Apple ID settings. FOR PRIVATE PRACTICE • Record a session, get a transcript on this iPhone • Clients tab: roster, recency, and every session in one place • Optional voice recognition (Unlock): name a client's voice once, with consent, and later sessions label them • SOAP and DAP drafts (Nasu Pro), on request — never automatically • Initials-only display for a waiting room or shared desk • Face ID / passcode lock PRIVATE BY ARCHITECTURE • Transcription, speaker labels, and note drafts run entirely on this device • Works in airplane mode • No account, no sign-up, no analytics SDK • iCloud sync is opt-in and off by default — it uses your iCloud, not ours • Voiceprints are stored only with consent, encrypted, and deletable WHO SAID WHAT • Speaker labels on every turn (Nasu Unlock) • Two-person mode for 1:1 sessions • Tap any label to correct it THE NOTE YOU REVIEW • SOAP and DAP templates are Nasu Pro, drafted on request, never automatically • Per-section redraft; a review step before the note is marked done • Export Markdown, PDF, or plain text — never gated RECORDING • Record live, transcribe after, or import a file • Recording continues with the screen locked • Custom vocabulary for names and clinical terms (Nasu Unlock) • English, French, German, Italian, Portuguese, and Spanish Nasu is a note tool, not an EHR, not a diagnostic aid, and not a HIPAA certification. Audio and notes stay on your device so there is no vendor to breach. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Your clients' words stay on your iPhone. Nasu just writes them down.
Screenshots
Verdict
The clearest difference is price: Nasu at Free against Shield's $0.99. Nasu also leads on iOS requirement (17.5 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Nasu is free to download; Shield costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Shield ships an update every 3 weeks, Nasu fortnightly. The most recent releases landed on September 14, 2026 and September 11, 2026 respectively.
| Parameter | Shield | Nasu |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.4 (8 ratings) — better | — |
| Positive reviews | 90.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 17.5 — better |
| Further details — not scored | ||
| Size | 8 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | TRILLIWON, Co. | Zebel OU |
In-app purchases
Shield
No in-app purchases
Nasu
No in-app purchases







