Comparison

Stringcalculator vs Passaggi

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

Head to head
About

Stringcalculator

Calculate string properties for various instruments. Determine diameter, tension, and tone based on material, frequency, and scale length. Supports multiple units of measurement.

Highlights
  • Calculate string diameter, tension, and tone
  • Supports gut, nylgut, carbon, Tynex, and nylon strings
  • Set custom frequencies
  • Calculate in cm, mm, or inches
  • Adjustable scale length
Features
Read full description

A string calculator to calculate single strings for historical (or modern) stringed instruments. Calculates strings from gut, nylgut, carbon (PVF), Tynex and nylon. Diameter, tension, tone and scale can be calculated. You can set any frequency instead of the chamber tone a'. Calculates in cm, mm or inch.

About

Passaggi

This app provides high-quality audio backing tracks for historical music performers to practice improvisation and ornamentation. It features adjustable tempo and pitch, user-defined looping, and historically accurate organ samples to enhance immersive study.

Highlights
  • High-quality audio backing tracks
  • Improvisation and ornamentation practice
  • Adjustable pitch and tempo
  • User-defined looping
  • Historically accurate organ samples
  • Complements historical treatises
Features
Read full description

Passaggi is an improvisation and ornamentation practice app for historical performers. The app delivers high-quality audio backing tracks for personal practice, which, when used in conjunction with facsimiles or modern editions of historical sources, enable the user to develop skills in the areas of improvisation and ornamentation. Suitable for students, amateurs and professionals alike, the app features adjustable pitch and tempo settings and user-defined looping capabilities. Tracks are recorded using a sampled historical organ in a temperament appropriate to the repertoire and are designed to complement the pedagogy of historical treatises. The idea behind Passaggi springs from a desire, common to many performers of historical repertoires, to recreate aspects of the musical experience as it may have existed at the time a piece of music was written. Improvisation and ornamentation may form only one aspect of this wide-reaching desire, yet it is clear that in this area students and professionals would achieve more successful immersive study and practice if the harmonic and musical context for improvisation, ornamentation and diminution were more easily accessible. How many of us can open Dalla Casa’s Il vero modo… and sing the baseline to his exercise embellishing Striggio’s I dolci colli, for example? And how much more profitable would our practice of this exercise be if we could? How many more of us would practise improvising on a ground, if we had a ground? The Passaggi project will enable more effective exploration of historical sources and approaches by providing digitally some aspects of the innate and inherited musical awareness common to all musicians of the past that we strive to connect with in the twenty-first century.

Screenshots

Stringcalculator1 screens
Passaggi4 screens

Verdict

The call

The clearest difference is price: Stringcalculator at $2.99 against Passaggi's $14.99. Stringcalculator also leads on review sentiment (100% vs 67%) and update cadence (every 16 months vs every 42 months). Passaggi's advantage is iOS requirement (11.0 vs 17.6). On ads, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Stringcalculator costs $2.99 and Passaggi $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stringcalculator ships an update every 16 months, Passaggi every 42 months. The most recent releases landed on October 15, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Stringcalculator versus Passaggi: the parameters behind the verdict, then further details
ParameterStringcalculatorPassaggi
Price$2.99 — better$14.99
Rating—4.0 (3 ratings) — better
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings—3 — better
Update frequencyEvery 16 months — betterEvery 42 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.611.0 — better
Further details — not scored
Size1 MB38 MB
Age rating4+4+
DeveloperMartin UhligThe Septenary Foundation

Customer experience

Stringcalculator

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Passaggi

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Stringcalculator

No in-app purchases

None

Passaggi

No in-app purchases

Questions

Is Stringcalculator free?
Stringcalculator costs $2.99, with no in-app purchases.
Is Passaggi free?
Passaggi costs $14.99, with no in-app purchases.
Do Stringcalculator or Passaggi have ads?
Neither Stringcalculator nor Passaggi shows ads.
Which is updated more often, Stringcalculator or Passaggi?
Stringcalculator ships an update every 16 months, and Passaggi every 42 months. Most recently, Stringcalculator was updated on October 15, 2026 and Passaggi on October 5, 2026.

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