Ring Sizing vs Nasu
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ring Sizing
Accurately measure ring sizes using your phone's screen. Determine diameter, circumference, and convert between international sizing systems. Ideal for jewelers and shoppers needing precise measurements.
- Measure ring diameter on screen
- Determine circumference in mm/inches
- Pacher method calculation
- International size conversion (EU, US, UK, JP)
- Precise slider for measurement
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Ring Size Find the perfect ring size quickly and accurately. Ring Size makes it easy to determine the correct ring size for yourself or someone special. Simply place a ring directly on your iPhone or iPad screen and adjust the on-screen circle with the slider until it perfectly matches the inside diameter of your ring. The app instantly calculates all important measurements and converts them into the most common international ring size standards. Features • Measure ring size directly on your screen • Precise diameter adjustment with an easy slider • Calculate ring circumference in millimeters and inches • Display the inside diameter • International ring size standards: * European sizes * US sizes * UK sizes * Japanese sizes • Supports the Pacher sizing method • Fast, accurate and easy to use • Perfect for jewelry shopping, jewelers and goldsmiths Whether you're buying an engagement ring, wedding band or fashion jewelry, Ring Size helps you find the perfect fit and avoid costly mistakes. An essential tool for online jewelry shopping and professional use.
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 update cadence: Nasu at fortnightly against Ring Sizing's every 10 months. Nasu also leads on iOS requirement (17.5 vs 26.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Ring Sizing ships an update every 10 months, Nasu fortnightly. The most recent releases landed on August 17, 2026 and September 11, 2026 respectively.
| Parameter | Ring Sizing | Nasu |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 17.5 — better |
| Further details — not scored | ||
| Size | 10 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Gerhard Lentschik | Zebel OU |
In-app purchases
Ring Sizing
No in-app purchases
Nasu
No in-app purchases









