M.E.L.C. vs AMA Toolkit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
M.E.L.C.
This tool helps aircraft engineers calculate the expiration dates for airplane defects based on minimum equipment lists. It provides a clear overview of all critical dates and allows for customization of defect categories.
- Calculate defect expiration dates
- Supports categories A, B, C, D
- View all important dates at a glance
- Customize defect categories
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M.E.L.C. is a tool for the aircraft engineers to calculate the expire date (with Category A, B, C and D) of defected airplanes in accordance with the minimum equipment list. With one quick view all important dates are visible. And a function to customize all categories.
AMA Toolkit
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AMA Toolkit is the ultimate offline-first technical reference suite and mathematical utility companion designed specifically for aircraft maintenance technicians, sheet metal mechanics, and avionic specialists. Built in alignment with standard aviation practices and FAA AC 43.13-1B guidelines, this premium utility brings a comprehensive collection of calculators, reference guides, and hardware decoders straight to your device—no internet connection required. Work with confidence even inside deep hangar basements, remote flight lines, or offline ramp environments. KEY FEATURES 1. ADVANCED AVIATION CALCULATORS (15-in-1 Suite) - Sheet Metal Bend Allowance: Instantly solve for Bend Allowance (BA), Setback (SB), and Bend Deduction (BD) to ensure crack-free, perfect flat layouts. - Fastener Grip Length Solver: Stack sheet metal thicknesses, washers, and nuts to compute the exact AN bolt dash number without risk of bottoming out. - Fraction-Decimal-Metric Converter: A fast, searchable database converting aviation fractions (1/64" to 1") to decimals and millimeters. - MEL Repair Deadline Calculator: Track Category A, B, C, and D repair intervals with calendar dates and custom day adjustments. - Fuel Weight & Volume Converter: Swiftly convert fuel quantities (Gallons, Liters, Pounds, Kilograms) for Jet A-1 and Avgas under temperature-adjusted densities. - Torque Adapter Offset Solver: Find target wrench torque settings when using extensions. - Flight Time Accumulator: Log flight hours and minutes with automatic base-60 mathematical carries. - Additional solvers for Rivet Length, Edge Distance, Tire Temp Correction, and more. 2. PRECISION METROLOGY SIMULATOR - Interactive Micrometer: Practice and verify 0.001" sleeve and thimble alignments with custom vector drawings and micro-step adjustments. - Interactive Vernier Caliper: Slide and view exact 0.001" line alignments with green-highlighted coincidence indicators. - Magnified Reference View: Tap any instrument for a crisp, high-resolution zoomed display to guarantee reading accuracy. 3. HARDWARE & RIVET GUIDES - Standard Hardware Decoder: Input standard AN part numbers to instantly break down size, length, thread pitch, and alloy specifications. - Hardware Dimensional Reference: Direct dimensional charts and head markings for aircraft bolts, nuts, and washers. - Rivet Specifications: Look up head markings, material codes, shear strengths, and installation rules for structural rivets. - Drill Bit Gauge Chart: Searchable lookup mapping gauge sizes (#80 to 1") to decimal equivalents. 4. SYSTEM FLOWS & PLUMBING - Fluid Line Color Codes: Identify hazard zones and system functions using official aircraft line tape symbols. - AN Fittings Guide: Match coupling nuts, sleeves, and unions based on material and color identifiers. - Corrosion Guide: High-utility classifications of surface, pitting, and galvanic corrosion. - Safety Wire Reference: Single-wire and double-twist wrap directions, count rules, and lockwire guidelines. - Electrical Tools: Ohm's law calculator and AWG wire size ampacity safety limits. COMPLIANCE & DISCLAIMER This application is designed as a pocket reference tool for educational and general workshop assistance. All calculations must be verified against current and effective aircraft-specific maintenance manuals (AMM) or structural repair manuals (SRM) before performing aircraft maintenance tasks. This application is intended for training and reference purposes only. It does not replace, supersede, or augment official aircraft manuals, airline standard operating procedures, or operator policies. Always refer to current and effective manufacturer documentation (AMM/FIM/MEL) for operational maintenance tasks. Optimize your hangar workflow and keep professional references at your fingertips with AMA Toolkit.
Screenshots
Verdict
The clearest difference is price: M.E.L.C. at Free against AMA Toolkit's $1.99. M.E.L.C. also leads on device support (3 vs 1) and iOS requirement (13.0 vs 26.2). AMA Toolkit's advantage is in-app purchases (none vs 1) and update cadence (fortnightly vs every 18 months). On ads 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
M.E.L.C. is free to download; AMA Toolkit costs $1.99 up front. M.E.L.C. sells 1 one-off in-app purchase. AMA Toolkit asks for nothing beyond the download.
M.E.L.C. ships an update every 18 months, AMA Toolkit fortnightly. The most recent releases landed on November 4, 2026 and November 10, 2026 respectively.
| Parameter | M.E.L.C. | AMA Toolkit |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 18 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone |
| Requires iOS | 13.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 6 MB | 4 MB |
| Age rating | 4+ | 17+ |
| Developer | Janko Enke | ERTUGRUL GULERYUZ |
In-app purchases
M.E.L.C.
- Full version$0.99
AMA Toolkit
No in-app purchases
Questions
Is M.E.L.C. free?
Is AMA Toolkit free?
Do M.E.L.C. or AMA Toolkit have ads?
Which is updated more often, M.E.L.C. or AMA Toolkit?
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