Drill Calc vs CB Radio Box
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Drill Calc
This utility app helps you determine the correct drill bit size for threaded holes. It supports both inch and metric threads, calculates close and tight fit hole sizes, and provides tables for standard drill bit sizes and pipe information.
- Calculates drill bit size for threaded holes
- Supports inch and metric threads
- Displays close and tight fit hole sizes
- Includes standard inch fractional and numeric drill bit tables
- Provides pipe size information
- Offers data on common wood screw sizes
Read full descriptionHide full description
Need to find the right drill bit size for a hole? Drill Calc calculates the correct drill bit size to use for threaded holes, based on the bolt (tap) diameter and thread pitch and percentage, for both inch and metric threads. Close and tight fit hole sizes for many popular drill sizes are also displayed. It also has tables of standard inch fractional and numeric drill bit sizes, as well as complete information for various pipe sizes. There is also detailed information about the commonly used sizes of wood screws. Buy your copy of Drill Calc today, and put away your drill chart.
CB Radio Box
Experience the nostalgia of 80s and 90s communication with this internet-based CB radio emulator. Connect with strangers anonymously using nicknames and country flags, or engage in private peer-to-peer chats with nearby friends via Bluetooth.
- Internet-based CB radio emulation
- Anonymous communication with nicknames
- Peer-to-peer Bluetooth communication
- 20 Base Channels and 70 Private Channels
- Country flags and user location display
- Ignore user functionality
- Supports cellular and Wi-Fi
Read full descriptionHide full description
This is the most famous CB Radio emulation that use internet to communicate. This app won't just be chat, but we want to re-create the emotions felt back in the 80s and 90s with the idea that you can talk to strangers and no one knowing who you really are! You can see from which country the other users are connected, you can choose a nick. The app is updated regularly, so don't miss it!!! You can ignore the last user with a button, and remove the ignored users from a list, sliding with the finger to the right. The app works in both cellular and wi fi mode. Press the Bluetooth button to enable the peer to peer communication only with the near friends. FEATURES: - Cellular / WiFi - Bluetooth (near friend peer to peer communication) - 20 Base Channel - 70 Private Channels - 10 Language Rooms - Gain at max volume - On/Off switch - Replay last message - Country flags - Map + annotations - Nicknames - Chat + Smileys - Ignore user button - Ignored list button
Screenshots
Verdict
The clearest difference is review sentiment: Drill Calc at 92% against CB Radio Box's 9%. Drill Calc also leads on rating (4.1 vs 2.3) and ratings volume (19 vs 4). CB Radio Box's advantage is update cadence (every 2 months vs every 18 months) and iOS requirement (10.0 vs 12.0). 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
Drill Calc costs $2.99 and CB Radio Box $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Drill Calc holds the better App Store score, 4.1 against 2.3. Both are backed by a comparable volume of ratings — 19 and 4 respectively. Written reviews point the same way: 92% of Drill Calc's written reviews are positive against 9% of CB Radio Box's.
Drill Calc ships an update every 18 months, CB Radio Box every 2 months. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.
| Parameter | Drill Calc | CB Radio Box |
|---|---|---|
| Price | $2.99 — better | $3.99 |
| Rating | 4.1 (19 ratings) — better | 2.3 (4 ratings) |
| Positive reviews | 91.7% of reviews — better | 8.9% of reviews |
| Number of ratings | 19 — better | 4 |
| Update frequency | Every 18 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 7 MB |
| Age rating | 4+ | 17+ |
| Developer | Black Cat Systems | Gennaro Coda |
Customer experience
Drill Calc
CB Radio Box
In-app purchases
Drill Calc
No in-app purchases
CB Radio Box
No in-app purchases
Questions
Is Drill Calc free?
Is CB Radio Box free?
Which has better reviews, Drill Calc or CB Radio Box?
Do Drill Calc or CB Radio Box have ads?
Which is updated more often, Drill Calc or CB Radio Box?
Other comparisons
