iStem vs Pedal Book
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
iStem
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iStem lets you split songs into drums, bass, vocals, and other instruments, remix them, and practice with tempo/pitch/metronome controls. Features: - Split in instrument/vocal tracks - Detect beats - Count-in function - Speed up or slow down songs - Change pitch - Set up loops for detailed practice - No login or user data required - All computation is done on the device - Export to file
Pedal Book
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Your pedal settings, saved for good. Dial in a tone on an analog pedal and it's gone the moment you touch the knobs again - unless you write it down, or try to remember it. Pedal Book fixes that. Build a digital copy of your analog pedals, and dial in the settings to match your favourite sounds, then save for later! -- HOW IT WORKS -- BUILD YOUR OWN PEDALS - Replicate your analog pedals by taking a photo or building them from scratch - Place knobs, footswitches, toggles, sliders, and labels exactly where they appear on your pedals - Start from a classic stompbox preset with a working on/off LED - Unlock sparkle, metallic, and hand-painted finishes with Premium CAPTURE YOUR SETTINGS - Match knob, switch, and slider settings to your actual guitar pedals - Save the tone to your library to access whenever needed - Add what guitar, amp, and other gear you used - Organize tones into folders you'll actually use - Unlock unlimited tones with premium SAVE YOUR SIGNAL CHAIN - Lay out your pedals on a pedalboard to save entire signal chains - Create different pedalboards for different occasions (i.e. gig, home, studio, etc...) TRACK YOUR GEAR - Log every guitar, amp, and pedal you own - Tie your gear directly to the tones you save YOUR DATA STAYS YOURS - No account, no sign-up, no cloud - Everything stays on your device โ nowhere else Free to use, with room to grow: Free tier - 3 Pedals, 5 Tones, 1 Pedalboard. Pro tier - 10 Pedals, 25 Tones, 3 pedalboards. Premium - Unlimited Pedals, Tones, and Pedalboards + NO ADS + Custom Pedal Finishes. Just want the ads gone? That's available on its own too.
Screenshots
Verdict
The clearest difference is ads: iStem at none against Pedal Book's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. iStem sells 1 one-off in-app purchase and Pedal Book sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
| Parameter | iStem | Pedal Book |
|---|---|---|
| Price | Free | Free |
| Update frequency | โ | Daily |
| Ads | No โ better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad โ better | iPhone |
| Requires iOS | 16.0 โ better | 17.6 |
| Further details โ not scored | ||
| Size | 79 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Jan Maes | Malcolm Lowy |
In-app purchases
iStem
- iStem Activation$4.99
Pedal Book
- Remove Ads$1.99
- Premium Upgrade$3.00
- Pro$6.99
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- Premium$9.99









