Comparison

BeltTune vs FilamentFlow

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

BeltTune

This utility app uses your phone's microphone to measure belt tension by analyzing audio frequencies. It provides instant measurements, supports multiple belt segments, and averages results for accuracy. Ideal for professionals and enthusiasts needing precise belt installations.

Highlights
  • Instant frequency measurement
  • Real-time audio analysis
  • Multiple belt segment support
  • Automatic frequency averaging
  • Intuitive workshop interface
  • No external hardware needed
Read full description

BeltTune brings professional-grade belt tension measurement to your pocket. Using advanced audio analysis, this powerful tool helps engineers, mechanics, and maintenance professionals ensure optimal belt installation and performance. KEY FEATURES: • Instant frequency measurement with real-time audio analysis • Support for multiple belt segments with individual measurements • Automatic frequency averaging for consistent results • Clean, intuitive interface designed for workshop environments • No external hardware required - just your iPhone's microphone PERFECT FOR: • Ferrari • Porsche 944/928 • Lotus Esprit • Ducati HOW IT WORKS: Simply tap and hold the "Listen" button, strike the belt to create a vibration, and BeltTune will instantly display the belt's natural frequency. Multiple measurements can be taken and averaged for enhanced accuracy, ensuring your belt installations meet manufacturer specifications every time. PROFESSIONAL ACCURACY: BeltTune utilizes sophisticated signal processing and harmonic analysis to deliver precise frequency measurements between 60-500 Hz, making it suitable for most industrial and automotive belt applications. Get BeltTune today and take the guesswork out of belt tension measurement. Your belts (and your machines) will thank you.

About

FilamentFlow

Manage your 3D printing filament inventory with detailed tracking of brand, material, color, and quantity. Monitor usage trends with insightful charts and records. No account is required to get started.

Highlights
  • Filament inventory management
  • Track brand, material, color, and quantity
  • Quick add/consume functionality
  • Filter and sort by various criteria
  • Usage records and trend charts
Features
Read full description

Know exactly what filament you have before you start the next print. FilamentFlow is a focused inventory manager for makers who want to keep every spool, material and remaining stock organized. BUILD A CLEAR SPOOL INVENTORY • Save the brand, model, material, color, diameter, weight and density for every spool. • Track PLA, PETG, ABS, TPU, engineering materials and more. • Keep counts current as you add filament or use it. FIND THE RIGHT MATERIAL FASTER • Filter your inventory by brand, material or color. • Sort spools by quantity or date. • Open a spool to review its specifications and stock changes. UNDERSTAND YOUR MATERIAL USE • Keep an inventory change history for additions and consumption. • See inventory totals and visual breakdowns by brand and material. • Review usage trends to make better restocking decisions. Your data stays with you and syncs through iCloud across supported devices. Use the Apple Watch companion to check your filament inventory and statistics from your wrist. FilamentFlow is built for hobbyists, print farms and anyone who wants a calmer, more reliable 3D-printing workflow.

Screenshots

BeltTune4 screens
FilamentFlow4 screens

Verdict

The call

The clearest difference is price: FilamentFlow at Free against BeltTune's $4.99. FilamentFlow also leads on device support (3 vs 1). BeltTune's advantage is rating (3.5 vs 2.0). On review sentiment, ratings volume, update cadence and 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

CostPrice · In-app purchases · Ads · Monetization

FilamentFlow is free to download; BeltTune costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

BeltTune holds the better App Store score, 3.5 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

BeltTune ships an update every 7 months, FilamentFlow every 8 months. The most recent releases landed on November 12, 2026 and November 7, 2026 respectively.

Scorecard4 real differences · 6 level
BeltTune versus FilamentFlow: the parameters behind the verdict, then further details
ParameterBeltTuneFilamentFlow
Price$4.99Free — better
Rating3.5 (2 ratings) — better2.0 (1 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings2 — better1
Update frequencyEvery 7 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhoneiPhone, iPad, Vision Pro — better
Requires iOS18.117.0 — better
Further details — not scored
Size4 MB1 MB
Age rating4+4+
DeveloperJustin Oakes文志 胡

Customer experience

BeltTune

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

FilamentFlow

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

BeltTune

No in-app purchases

None

FilamentFlow

No in-app purchases

Questions

Is BeltTune free?
BeltTune costs $4.99, with no in-app purchases.
Is FilamentFlow free?
FilamentFlow is free to download, with no in-app purchases.
Which has better reviews, BeltTune or FilamentFlow?
BeltTune is rated higher. BeltTune averages 3.5 out of 5 from 2 ratings, while FilamentFlow averages 2.0 from 1 ratings.
Do BeltTune or FilamentFlow have ads?
Neither BeltTune nor FilamentFlow shows ads.
Which is updated more often, BeltTune or FilamentFlow?
BeltTune ships an update every 7 months, and FilamentFlow every 8 months. Most recently, BeltTune was updated on November 12, 2026 and FilamentFlow on November 7, 2026.

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