NanoRate vs Quietmarks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NanoRate
This utility app offers a straightforward way to convert currencies, supporting multiple currencies and historical data. It features AR price scanning and offline access for convenience.
- Multi-currency comparison
- Historical date lookup
- Fee-inclusive conversion
- AR price scanning
- Offline rate access
- Home Screen widget
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NanoRate is a lightweight currency converter for daily use. It supports base currency switching, multi-currency comparison, historical date lookup, fee-inclusive conversion, and trend view. You can also scan a price with AR camera and insert it directly into conversion. Rates are fetched from a public API, with local fallback reference data when offline. Home Screen widget is supported for quick checks.
Quietmarks
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Prepare a date-bounded chronology from your saved noise observations, with a full preview before sharing. HOW IT WORKS 1. Open Entries and tap Timeline. Choose the first and last calendar day. 2. Choose whether to include notes, witness names and approximate readings. Photos are excluded. 3. Review the complete timeline before sharing. An explicitly labeled example can be explored without changing your log. Noise capture, saved entries, recurrence tools and existing reports remain available. WHAT TO KNOW These are user-recorded observations, not verified findings or a certified sound-level report. Missing days are unknown, not evidence of silence. Perceived durations may overlap. Headlines, source, room and impact fields remain included and can contain personal information; inspect the preview. iPhone and iPad.
Screenshots
Verdict
The clearest difference is price: NanoRate at Free against Quietmarks's $2.99. Quietmarks's advantage is in-app purchases (none vs 1) and update cadence (weekly vs every 2 months). On ads, device support and iOS requirement 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
NanoRate is free to download; Quietmarks costs $2.99 up front. NanoRate sells 1 one-off in-app purchase. Quietmarks asks for nothing beyond the download.
NanoRate ships an update every 2 months, Quietmarks weekly. The most recent releases landed on September 18, 2026 and September 21, 2026 respectively.
| Parameter | NanoRate | Quietmarks |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | 恒俭 董 | Robert Corbin |
In-app purchases
NanoRate
- NanoRate Pro Unlock$1.99
Quietmarks
No in-app purchases





