Comparison

Song Builder vs SUS4 BPM

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

Head to head
About

Song Builder

Features
Read full description

SongBuilder is a focused writing space designed specifically for songwriters. Stop using generic notes apps to write structured songs. SongBuilder gives you a clean, purpose-built framework with dedicated sections for: β€’ Verse 1 β€’ Verse 2 β€’ Verse 3 β€’ Chorus β€’ Bridge Write freely with no character limits. Build complete songs or capture fragments of inspiration in seconds. Key Features β€’ Structured song framework (Verse / Chorus / Bridge) β€’ Unlimited songs β€’ No character limits β€’ Favourites (star your best ideas) β€’ Tags & moods (e.g. R&B, Afrobeat, Sad, Upbeat) β€’ Search functionality β€’ Sort by Created, Updated, Title or Favourites β€’ Clean, distraction-free design β€’ iPhone-optimised experience Whether you’re drafting lyrics, refining hooks, or organising a catalogue of ideas, SongBuilder helps you move from inspiration to finished song with clarity and structure. Simple. Focused. Built for songwriters.

About

SUS4 BPM

Features
Read full description

What's the tempo? Tap it. Or just let the app listen. SUS4 BPM does two things: it captures tempo from your taps, and it detects BPM live from a mic or an audio file. Both are useful. When a musician in the room is playing something and you need to know the exact tempo before you open your DAW or set a metronome, just point your phone and read the number. Tap mode averages your taps and shows a stable BPM immediately. Live detection mode streams the BPM in real time from any audio source β€” a drummer practising, a track playing on a speaker, a click in a film cue. File analysis lets you load a recording and pull the tempo without even being in the same room as the player. β€’ Tap-tempo averaging with immediate stable readout β€’ Live streaming BPM detection from any audio source via mic β€’ Audio file analysis β€” load a track, get the tempo β€’ Clean, large display β€” readable at a glance from across a desk β€’ Subscribe monthly, or unlock the full SUS4 suite forever: unlimited live detection sessions and file analyses Everything runs on your device. No audio files are ever uploaded. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Song Builder4 screens
SUS4 BPM4 screens

Verdict

The call

The clearest difference is in-app purchases: Song Builder at none against SUS4 BPM's 1. SUS4 BPM's advantage is device support (4 vs 1) and iOS requirement (16.0 vs 26.2). On price, update cadence and ads there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. SUS4 BPM sells 1 in-app purchase, starting at $1.99 per month. Song Builder asks for nothing beyond the download.

UpkeepUpdate frequency

Song Builder ships an update monthly, SUS4 BPM fortnightly. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

Scorecard3 real differences Β· 3 level
Song Builder versus SUS4 BPM: the parameters behind the verdict, then further details
ParameterSong BuilderSUS4 BPM
PriceFreeFree
Update frequencyMonthlyFortnightly β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhoneiPhone, iPad, Mac, Apple Watch β€” better
Requires iOS26.216.0 β€” better
Further details β€” not scored
Size2 MB21 MB
Age rating4+4+
DeveloperJulian CambridgeThePaulSmith

In-app purchases

None

Song Builder

No in-app purchases

1 purchases

SUS4 BPM

Subscriptions1
  • SUS4 BPM Pro Monthly$1.991 Month

Questions

Is Song Builder free?
Song Builder is free to download, with no in-app purchases.
Is SUS4 BPM free?
SUS4 BPM is free to download, with in-app purchases available.
Do Song Builder or SUS4 BPM have ads?
Neither Song Builder nor SUS4 BPM shows ads.
Which is updated more often, Song Builder or SUS4 BPM?
Song Builder ships an update monthly, and SUS4 BPM fortnightly. Most recently, Song Builder was updated on October 2, 2026 and SUS4 BPM on October 6, 2026.

Other comparisons