Comparison

NanoRate vs Prometheus

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Multi-currency comparison
  • Historical date lookup
  • Fee-inclusive conversion
  • AR price scanning
  • Offline rate access
  • Home Screen widget
Features
Read full description

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.

About

Prometheus

Visualize your life as a continuously updating clock, down to 10 decimal places. Track unique milestones and explore life statistics. Available on iPhone and Apple Watch with customizable widgets and complications.

Highlights
  • Decimal age clock
  • Life milestone countdowns
  • Detailed life statistics
  • Apple Watch app and complications
  • Home and Lock Screen widgets
  • Live Activities support
Features
Read full description

Your time is precious. See it. Prometheus turns your age into a living clock, updating continuously to 10 decimal places. Count down to numbers you will only pass once, explore your life in weeks and statistics, and keep time visible across iPhone and Apple Watch. YOUR LIFE, LIVE • See your decimal age or a detailed breakdown of years, months, days, hours, minutes, and seconds • Count down to your billionth second, 10,000th day, next trip around the sun, and other once-in-a-lifetime milestones • Get an optional alert at the exact moment a milestone arrives • Explore estimated heartbeats and breaths, lunar cycles, distance traveled through space, and more • See your entire life as one dot for every week ON EVERY SCREEN • Apple Watch app and watch face complications • Home Screen and Lock Screen widgets • Live Activities on the Lock Screen and Dynamic Island • Shareable cards for Stories, Reels, and more SET UP ONCE Enter your birth date and time. Prometheus handles the rest. Your birth data stays on your devices, and no account or sign-in is required. Named after the Titan who gave humanity fire and knowledge, Prometheus is a reminder to see and use your most precious resource: time.

Screenshots

NanoRate4 screens
Prometheus4 screens

Verdict

The call

The clearest difference is in-app purchases: Prometheus at none against NanoRate's 1. On price, rating, ratings volume and update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. NanoRate sells 1 one-off in-app purchase. Prometheus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for NanoRate against 5.0 for Prometheus. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

NanoRate ships an update every 2 months, Prometheus every 3 months. The most recent releases landed on November 8, 2026 and October 19, 2026 respectively.

Scorecard1 real difference · 8 level
NanoRate versus Prometheus: the parameters behind the verdict, then further details
ParameterNanoRatePrometheus
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17.617.6
Further details — not scored
Size4 MB5 MB
Age rating4+4+
Developer恒俭 董Wouter Stierhout

Customer experience

NanoRate

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Prometheus

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

NanoRate

One-time1
  • NanoRate Pro Unlock$1.99
None

Prometheus

No in-app purchases

Questions

Is NanoRate free?
NanoRate is free to download, with in-app purchases available.
Is Prometheus free?
Prometheus is free to download, with no in-app purchases.
Which has better reviews, NanoRate or Prometheus?
NanoRate and Prometheus are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do NanoRate or Prometheus have ads?
Neither NanoRate nor Prometheus shows ads.
Which is updated more often, NanoRate or Prometheus?
NanoRate ships an update every 2 months, and Prometheus every 3 months. Most recently, NanoRate was updated on November 8, 2026 and Prometheus on October 19, 2026.

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