U.S. Airlines, Past & Present vs Army Engineer Guide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
U.S. Airlines, Past & Present
Discover a comprehensive directory of 237 U.S. passenger airlines, both current and historical. Explore the lineage of each airline and their successors, with information dating back to 1924.
- Directory of 237 U.S. airlines
- Past and present airlines
- Trace airline successors
- Historical data back to 1924
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This handy application provides a directory of 237 U.S. passenger airlines, past and present. Trace each airline and their successors, dating back to 1924.
Army Engineer Guide
This app provides essential engineering tools and references for military engineers. It offers unit converters, construction calculators, and planning resources designed for offline use in the field. Access field manuals and helpful links without ads or subscriptions.
- Unit Converters (Metric/US/Military)
- Construction Calculators (Concrete, Lumber, Excavation, Sandbag)
- Range Finder
- Customizable Packing Lists
- Field Notes Journal
- Offline Access to Field References
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Army Engineer Guide, first published in 2012, totally rebuilt and deployed for 2025 by our New School Army project. Army Engineer tools & reference, no ads, no subscriptions, no accounts and log ins, no data collection, just straight gas to get your Essayons On. ESSENTIAL ENGINEERING TOOLS: Unit Converters - Convert between metric and U.S. units for distance, weight, volume, temperature, area, pressure, and speed. Includes specialized military-specific conversions to support field operations. CONSTRUCTION SUPPORT: Concrete Calculator - Calculate concrete volume, bags, and weight for construction projects with precision. Support for rectangular, circular, and L-shaped designs. Lumber & Nails Calculator - Estimate materials needed for wooden structures. Plan efficiently and eliminate waste. Excavation Calculator - Calculate soil volume and equipment requirements for field fortifications and defensive positions. Sandbag Calculator - Sums up the number of sandbags needed to construct a sandbag wall and estimates the time required based on number of people and speed to fill a sandbag. Individual PLANNING: Range Finder - Visualize distances and ranges on tactical maps. Perfect for developing range estimation skills and planning defensive positions. Packing List - Create, customize and share detailed packing lists for engineering missions. Ensure your team has the right equipment every time. Journal - Document lessons learned and keep field notes organized in one secure location. ADDITIONAL RESOURCES: Field References - Quick access to FM 3-34 and other essential engineering references. Helpful Links - Curated web links for Engineers (schoolhouse, Army engineer Association and so on...). FEATURES THAT MATTER: - Zero cloud dependency - your data stays on your device - No account required - download and start immediately - Built-in sharing for calculations and plans - Designed for offline use in the field Perfect for Combat Engineers, Construction Engineers, and Engineer Leaders who need reliable, offline access to technical calculators and planning tools.
Screenshots
Verdict
The clearest difference is update cadence: Army Engineer Guide at every 3 months against U.S. Airlines, Past & Present's every 13 months. Army Engineer Guide also leads on review sentiment (33% vs 22%) and iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and monetization model 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
U.S. Airlines, Past & Present costs $0.99 and Army Engineer Guide $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
U.S. Airlines, Past & Present ships an update every 13 months, Army Engineer Guide every 3 months. Both last shipped on October 22, 2026.
| Parameter | U.S. Airlines, Past & Present | Army Engineer Guide |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 2.0 (4 ratings) — better | — |
| Positive reviews | 22.2% of reviews | 33.3% of reviews — better |
| Number of ratings | 4 — better | — |
| Update frequency | Every 13 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 38 MB |
| Age rating | 4+ | 17+ |
| Developer | iStuff | Polemics Applications LLC |
Customer experience
U.S. Airlines, Past & Present
Army Engineer Guide
In-app purchases
U.S. Airlines, Past & Present
No in-app purchases
Army Engineer Guide
No in-app purchases
