DAIG Bookshelf vs World Postal Zip Codes ePost
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DAIG Bookshelf
Access a local library of commonly used, publicly available Army Inspector General publications. This app is designed for offline use, saving you time and providing essential documents when disconnected.
- Local copy of publications
- Publicly available IG documents
- Time-saving access
- Disconnected use
- Reference material
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The DAIG (Department of the ARMY Inspector General) bookshelf is a time-saving application that provides a local copy of commonly used publicly available IG publications. These are intended for disconnected use.
World Postal Zip Codes ePost
Access a comprehensive global database of postal codes with quick search and interactive map features. Ideal for travelers, logistics professionals, and developers needing accurate address information for over 190 countries. Supports offline viewing and advanced filtering.
- Global postal code database
- Quick search by city, address, or coordinates
- Interactive map view
- Offline access to saved codes
- Advanced filtering options
- Detailed country and region data
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Find any ZIP, postcode or pincode across 190+ countries — instantly. Search by city, GPS or address. Works offline. The world's most complete postal code reference: travelers, shippers, developers and marketers rely on it daily. Key Features: - Quick Search: Find postal codes by city, address, or geographic coordinates. - Global Database: Access postal codes from over 190 countries with up-to-date data. - Interactive Map: View locations on a dynamic map with geographic details. - Additional Information: Discover key data such as provinces, regions, and administrative subdivisions. - Offline Mode: Save postal codes for offline viewing. - Advanced Filters: Filter by country, region, or postal code type (urban, rural, special, etc.). Use Cases: - Shipping and logistics companies to optimize deliveries. - Travelers and digital nomads to accurately locate addresses. - Marketing and sales teams to segment customers by location. - Developers and technology companies that need an accurate postal database.
Screenshots
Verdict
The clearest difference is review sentiment: World Postal Zip Codes ePost at 100% against DAIG Bookshelf's 25%. World Postal Zip Codes ePost also leads on rating (4.4 vs 3.3). DAIG Bookshelf's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume 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
Both are free to download. World Postal Zip Codes ePost sells 1 one-off in-app purchase. DAIG Bookshelf asks for nothing beyond the download.
World Postal Zip Codes ePost holds the better App Store score, 4.4 against 3.3. Both are backed by a comparable volume of ratings — 7 and 10 respectively. Written reviews point the same way: 25% of DAIG Bookshelf's written reviews are positive against 100% of World Postal Zip Codes ePost's.
DAIG Bookshelf ships an update every 5 weeks, World Postal Zip Codes ePost every 3 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.
| Parameter | DAIG Bookshelf | World Postal Zip Codes ePost |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (7 ratings) | 4.4 (10 ratings) — better |
| Positive reviews | 25.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 | 10 — better |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 402 MB | 221 MB |
| Age rating | 4+ | 4+ |
| Developer | TRADOC Mobile | Eyermin Colon Sanchez |
Customer experience
DAIG Bookshelf
World Postal Zip Codes ePost
In-app purchases
DAIG Bookshelf
No in-app purchases
World Postal Zip Codes ePost
- Full version postal codes$3.99
Questions
Is DAIG Bookshelf free?
Is World Postal Zip Codes ePost free?
Which has better reviews, DAIG Bookshelf or World Postal Zip Codes ePost?
Do DAIG Bookshelf or World Postal Zip Codes ePost have ads?
Which is updated more often, DAIG Bookshelf or World Postal Zip Codes ePost?
Other comparisons
