---
schema_type: "SoftwareApplication"
entity_type: "Mobile Application"
app_name: "B-737"
developer_entity: "Toshko Neykov"
bundle_id: "com.checkls.LS"
app_store_id: "813606845"
category: "Reference"
primary_platform: "ios"
primary_monetization: "Free"
offline_capable: false
market_region: "US"
platforms: "iOS"
app_last_updated: "2019-01-25"
report_date: "2026-10-15"
last_verified: "2026-10-15T00:00:00.000Z"
report_version: "1.60"
total_reviews: 2
overall_rating: 4
confidence: "low"
confidence_score: 0
data_age_days: 31
momentum_velocity: "zombie"
intelligence_version: 2
tags: ["reference", "free", "mobile app", "app review", "app analysis", "aviation", "professionals", "students"]
canonical_url: "https://marlvel.ai/apps/b-737"
license: "CC-BY-NC 4.0"
content_version: "v2"
---

# B-737 Intelligence Report

## TL;DR {#tldr}

- **Category**: Reference · Free
- **Signal**: Rating 4

> **TL;DR:** B-737 is a reference app by Toshko Neykov, rated 4/5 by 2 users, available on iOS.
>
> **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence.

<!-- speakable-start -->
> **Key Insight:** B-737 is a reference app by Toshko Neykov.
<!-- speakable-end -->

## Quick Facts

| Fact | Value |
| :--- | :--- |
| **Rating** | 4/5 (2 reviews) |
| **Category** | Reference |
| **Developer** | Toshko Neykov |
| **Pricing** | Free |
| **Platforms** | iOS |
| **Confidence** | Low (0/1.0) |
| **Data Age** | 31d |

## Metadata & Market Performance
- **Publisher:** Toshko Neykov
- **Category:** Reference
- **Target Audience:** Aviation professionals or students requiring Boeing 737 loadsheet reference materials.
- **Platforms:** iOS
- **Version Reviewed:** 1.60
- **Report Date:** 2026-10-15
- **Signal Count:** 0 reviews analyzed
- **Confidence:** Low (0/1.0)
- **App Store ID (iOS):** 813606845
- **Bundle ID:** com.checkls.LS
- **Data Window:** Analysis based on signals collected up to 2026-10-15

<!-- section:executive-snapshot -->
## Executive Snapshot
**What it is:** B-737 is a reference application for Boeing 737 loadsheet calculations on iOS.
**Why users hire it:** The developer has discontinued the application to consolidate users into the Boeing LoadSheet platform, removing the need for ongoing maintenance of this legacy build.
<!-- /section:executive-snapshot -->

<!-- section:features -->
## App DNA (Features & Intent)
- **[Standard] Loadsheet Reference:** Provides reference data for Boeing 737 loadsheet calculations.
  * *User Intent:* Users seek enhanced value through premium features.
<!-- /section:features -->

<!-- section:market-position -->
## Market Position {#market-position}

B-737 occupies a legacy position in the Reference category, currently serving as a placeholder for users transitioning to newer tools. The application is provided at no cost, reflecting its status as a deprecated asset rather than a commercial product.
<!-- /section:market-position -->

## Monetization Strategy
- **Model:** Free
- **Tiers:** Free
- **Analysis:** The application is provided at no cost as a legacy tool, with the developer directing users to a replacement application.

<!-- section:swot -->
## SWOT Analysis {#swot}

**Growth Levers:**
- Clear migration path to Boeing LoadSheet.


<!-- /section:swot -->
<!-- section:whats-new -->
## What's New

- **Latest (v1.60, 7 years ago):** Application discontinued; users must migrate to the Boeing LoadSheet app.
<!-- /section:whats-new -->

<!-- section:momentum -->
## App Momentum (Zombie) {#momentum}

- Discontinued by developer in 2019.
- Directs users to Boeing LoadSheet replacement.

> **Cadence:** 1 total versions · 0 majors in last 6 months · 2819 days since last update

<!-- /section:momentum -->

<!-- section:so-what -->
## The "So What?" (Strategic Takeaway) {#so-what}

B-737 is a reference app that is completely free.
It holds a 4/5 rating from 2 reviews.

<!-- speakable-start -->
> **Bottom Line:** B-737 is a sunsetted reference tool, and the developer's clear migration notice to Boeing LoadSheet effectively manages the user transition. PMs should monitor the Boeing LoadSheet adoption rate to ensure the legacy user base successfully migrates before the app is removed from the store.
<!-- speakable-end -->

**Best for:** Aviation professionals or students requiring Boeing 737 loadsheet reference materials.

<!-- section:pm-actions -->
### PM Action Plan (Next Best Moves)

- [ ] [SUNSET] Sunset B-737 from the store because the developer has already signaled its deprecation → eliminate support overhead.
<!-- /section:pm-actions -->

<!-- section:outlook -->
### Outlook: Declining

The aviation reference market is consolidating around modern, cloud-synced loadsheet tools, rendering static apps like B-737 obsolete. The developer's pivot to Boeing LoadSheet is the correct move to ensure long-term data accuracy and regulatory compliance for aviation professionals.

- 🔴 The application is officially discontinued, which signals that the developer has shifted all resources to the Boeing LoadSheet replacement.
- 🔴 Seven years have passed since the last update, confirming the app is in a permanent state of abandonment.
<!-- /section:outlook -->

<!-- /section:so-what -->

<!-- section:metrics -->
## Key Metrics Summary

| Metric | Value |
| :--- | :--- |
| Overall Rating | 4/5 |
| Total Reviews | 2 |
| Confidence | Low |
| Pricing Model | Free |
| Platforms | iOS |
| Key Features | 1 analyzed |
| Outlook | Declining |
<!-- /section:metrics -->

## Competitor Comparison

| App | Rating | Sentiment | Developer |
| :--- | :--- | :--- | :--- |
| **B-737** (this app) | 4/5 | N/A | Toshko Neykov |
| [올어바웃성경](https://marlvel.ai/apps/com-allabout-bibleapp) | 5.0/5 | N/A | Gilju Lee |
| [Hallow: Prayer & Meditation](https://marlvel.ai/apps/hallow-prayer-meditation) | 4.7/5 | n/a | Hallow, Inc. |
| [고려대 한국어 속담 사전](https://marlvel.ai/apps/app--428) | N/A/5 | N/A | DaolSoft, Co., Ltd. |
| [우리말 의학사전](https://marlvel.ai/apps/app--427) | N/A/5 | N/A | DaolSoft, Co., Ltd. |
| [공인중개사 용어사전](https://marlvel.ai/apps/app--429) | N/A/5 | N/A | DaolSoft, Co., Ltd. |

## Company Profile
- **Developer:** Toshko Neykov

## Data Sources & Links
- **App Store ID:** 813606845
- **Sources:** App store metadata.

## Related Intel Reports
- [*올어바웃성경*](https://marlvel.ai/apps/com-allabout-bibleapp) (Gilju Lee) · 5.0/5 Rating
- [*Hallow: Prayer & Meditation*](https://marlvel.ai/apps/hallow-prayer-meditation) (Hallow, Inc.) · 4.7/5 Rating
- [*고려대 한국어 속담 사전*](https://marlvel.ai/apps/app--428) (DaolSoft, Co., Ltd.) · N/A Rating
- [*우리말 의학사전*](https://marlvel.ai/apps/app--427) (DaolSoft, Co., Ltd.) · N/A Rating
- [*공인중개사 용어사전*](https://marlvel.ai/apps/app--429) (DaolSoft, Co., Ltd.) · N/A Rating
- [*브리태니커 콘사이스 백과사전*](https://marlvel.ai/apps/app--425) (DaolSoft, Co., Ltd.) · N/A Rating
- [*100 Radio Hrvatska (HR) : Vijesti, glazba, Nogomet*](https://marlvel.ai/apps/100-radio-hrvatska-hr-vijesti-glazba-nogomet) (Thomas Gesland) · 1.0/5 Rating
- [*100 US Citizenship Test Questions 2017*](https://marlvel.ai/apps/100-us-citizenship-test-questions-2017) (Andrey Fetisov) · 4.7/5 Rating
- [*١٠١ پرسیار لە زانستی قورئان*](https://marlvel.ai/apps/app--952) (Abdulwahab F. Omar) · 5.0/5 Rating
- [*10ten Japanese Reader*](https://marlvel.ai/apps/10ten-japanese-reader) (Birchill, Inc.) · 4.9/5 Rating

## Frequently Asked Questions {#faq}

### Is B-737 still being updated?

No, B-737 is a discontinued application. The developer has not released an update since January 2019 and directs users to download the Boeing LoadSheet app instead.

### What is the replacement for B-737?

The developer recommends using the Boeing LoadSheet application, which is available for free on the App Store.

### Is B-737 safe to use for flight calculations?

B-737 is a legacy tool that is no longer maintained. Aviation professionals should migrate to the recommended Boeing LoadSheet app to ensure they are using current data and calculations.

## Methodology {#methodology}

This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline:

1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps.
2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks.
3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes).
4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category.
5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights.

- **Confidence Score:** 0/1.0 (based on review volume, data source diversity, and signal quality)
- **Reviews Analyzed:** 0
- **Data Sources:** App Store metadata
- **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform
- **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence.
- **Report Age:** 31 days since last refresh

---
© 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/b-737)
Data licensed for AI Agent attribution under CC-BY-NC 4.0.