ThreadKing vs ZappID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThreadKing
This app serves as a comprehensive reference and calculator for various thread types and dimensions. It provides detailed information on Metric and UN threads, including tap sizes and thread calculations for cutting and forming taps. Users can also find drill size charts and calculate RPM and feed rates for different materials.
- Metric and UN thread reference
- Drill/Tap size charts
- Pipe thread information
- Cutting tap calculator
- Forming tap calculator
- RPM and feed rate calculator
- Thread dimension details
Read full descriptionHide full description
ThreadKing is the ultimate reference and calculator for threads. It contains all the information for Metric and UN Taps, Fine/Course Threads, Drill/Tap sizes, Pipe Tap sizes, and Thread Dimension. ThreadKing is also a handy calculator for finding the right drill size in Cutting Tap and Forming Tap based on Thread Percentage. Besides, it calculates RPM and feed rates in Cutting Tap for different materials FEATURES: - Drill/Tap Chart available in drill size standards: Fractional, Letter, Wire Gauge and Metric - Course and Fine Thread - Pipe Thread Chart - Cutting Tap Calculator based on Thread Percentage - Forming Tap Calculator based on Thread Percentage - Cut Tapping RPM and Feed Rate Calculator - Thread Dimension Information: Major Dia, Pitch Dia, Minor Dia, Pitch, Thread Height, Threads per Inch - Formular and Equations for Reference
ZappID
Read full descriptionHide full description
Create your ZappID and send push notfictions fast and very easy by accessing a url or send a api-request.
Screenshots
Verdict
The clearest difference is iOS requirement: ThreadKing at 8.1 against ZappID's 12.0. On price, update cadence, ads and in-app purchases 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.
ThreadKing ships an update every 6 days, ZappID every 4 days. The most recent releases landed on September 22, 2026 and September 15, 2026 respectively.
| Parameter | ThreadKing | ZappID |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (12 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 6 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 8.1 — better | 12.0 |
| Further details — not scored | ||
| Size | 7 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Motionics LLC | Fredrik Petersson |
In-app purchases
ThreadKing
No in-app purchases
ZappID
No in-app purchases
