Rul3r vs FlashDrop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rul3r
This utility app provides a portable ruler for on-the-go measurements. It also includes a suite of additional tools like a protractor, spirit level, and various meters for diverse measurement needs.
- Portable ruler
- Protractor
- Spirit level
- Altimeter
- Decibel meter
- Plumb line
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Did you ever want to measure the length of something but you had no ruler at hand? Rul3r was created exactly for situations like this, so that a portable ruler is always available to you on your phone, whenever you need it. What's more, Rul3r provides a lot more tools: * Protractor * Plumb Line * Spirit Level * Elevation, Air Pressure and Location meter * Decibel Meter * Ordinal Date Converter
FlashDrop
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FlashDrop is a simple, secure, and fast file-sharing app. Just enter the same Room ID to instantly share any file—photos, videos, documents, and more. 【Key Features】 Simple sharing via Room ID - Just enter a Room ID of 1 to 16 characters - Share files with anyone who enters the same ID - Automatically saves previously used Room IDs P2P (Peer-to-Peer) Connection - Direct data transfer between devices - High speed since it bypasses servers - Emphasizes privacy and security Supports Diverse File Formats - Photos/Videos: Automatically saved to your camera roll - Documents: Saved to your download folder - Text messages: Securely send sensitive info like passwords Real-time transfer status display - Check transfer progress in real time - Shows file size and transfer speed - Includes cancel function Batch send multiple files - Select up to 20 files simultaneously - Supports drag-and-drop - Instantly share photos taken with your camera 【Useful Scenarios】 • Sharing photos and videos with friends and family • Quickly distributing meeting materials • Transferring files between devices • Sharing large files • Securely sending passwords and authentication codes 【Reliable Privacy Protection】 - Files are never stored on servers - Direct peer-to-peer transfers between devices - Room IDs persist after use for easy future access - All communications are encrypted for secure transfer 【Supported File Formats】 Images: JPEG, PNG, GIF, HEIC, etc. Videos: MP4, MOV, AVI, etc. Documents: PDF, DOCX, XLSX, PPTX, etc. Others: ZIP, TXT, CSV, etc. - All file formats supported 【How to Use】 1. Launch the app and enter the Room ID 2. Have the recipient enter the same Room ID 3. Select files and tap the Send button 4. Transfer starts automatically once the recipient approves 【Recommended Environment】 - Recommended for use on Wi-Fi (for large files) - Compatible with iOS 14.0 or later - Available on both iPad and iPhone Terms of Service: https://flash-drop.web.app/terms_en.html Privacy Policy: https://flash-drop.web.app/privacy_en.html
Screenshots
Verdict
The clearest difference is update cadence: FlashDrop at every 10 days against Rul3r's every 2 months. FlashDrop also leads on iOS requirement (13.0 vs 16.0). On price, 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
Both are free to download. Rul3r sells 1 one-off in-app purchase and FlashDrop sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Rul3r ships an update every 2 months, FlashDrop every 10 days. The most recent releases landed on September 22, 2026 and May 19, 2026 respectively.
| Parameter | Rul3r | FlashDrop |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1K ratings) — better | — |
| Positive reviews | 44.8% of reviews | — |
| Number of ratings | 1K — better | — |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | YOYASOFT LLC | BUTTERFALCON |
In-app purchases
Rul3r
- Remove Ads$2.99
FlashDrop
- Monthly$1.991 Month
- Annual$17.991 Year








