calcDS vs NTP Inspector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
calcDS
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The Last Calculator you will ever need. Perfect choice for scientists, engineers and programmers.featuring standard mathematic functions, as well as a full 64bit binary calculator with displays in Binary, Octal, Decimal and Hexadecimal. There are no IN-APP purchases or annoying ads ever
NTP Inspector
This utility app allows you to query NTP servers on the internet and view detailed information from their responses. It helps troubleshoot server issues by providing protocol version, stratum, reference time, and leap second status directly from your device.
- Query NTP servers
- View protocol version
- Check server stratum
- Report reference time
- Detect leap seconds
- Troubleshoot network issues
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NTP Inspector is an application that allows you to check servers running the NTP protocol over the Internet and report some basic information. It sends an NTP packet from your device to the server and reports backs almost everything included in the response, like the protocol version, mode, the server Stratum, its precision, reference time, as well as whether there is a leap second today or not. With this app you can troubleshoot NTP servers from anywhere, as seen from your device, and not a remote server, with complete privacy. The app was created when I received an alert for one of my NTP pool servers while outside and without laptop access, with no other option to query it to see what's wrong.
Screenshots
Verdict
The clearest difference is price: NTP Inspector at Free against calcDS's $1.99. calcDS's advantage is iOS requirement (14.0 vs 18.0). On 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
NTP Inspector is free to download; calcDS costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | calcDS | NTP Inspector |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | — | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | R.David Sisemore | Antonios Chariton |
In-app purchases
calcDS
No in-app purchases
NTP Inspector
No in-app purchases









