AirChord vs Graph Calc Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AirChord
Stream audio wirelessly to AirPlay and Bluetooth speakers. This app also introduces internet streaming, allowing you to save and replay audio sessions on demand, creating a personal audio station.
- Wireless audio streaming
- AirPlay and Bluetooth speaker support
- Internet streaming
- Save and replay audio sessions
- Personal audio station
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Everything's new in AirChord 3. The app has been rebuilt to be faster, smoother, and more powerful. Stream to AirPlay and Bluetooth speakers like before, plus a brand new feature: Internet streaming. Now you can save your turntable sessions and replay them on-demand. It's your personal vinyl radio station.
Graph Calc Plus
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Graph Calculator define the graph of [f] to be the graph of the equation y = f(x). So, the graph of a function if a special case of the graph of an equation. Features: ∙ Set individual line color. ∙ Show/Hide individual mathematical expression. ∙ Pinch to Zoom in/out Graph View. ∙ Pan to reposition Graph View. ∙ Add up to 22 mathematical expressions. ∙ Full screen preview. Graph Features: ∙ Custom background color for Graph. ∙ Custom grid color for Graph. ∙ Show/Hide Grid Lines/Minor Grid Lines. ∙ Show/Hide Axis Number. ∙ Show/Hide X-Axis. ∙ Show/Hide Y-Axis. ∙ Set Graph Line Width range from 0.5~5.0. Some of the most commonly used functions: y = mx + b y = x**2 [x²] y = x**3 [x³] y = sqrt(x) [√x] y = ln(x) y = log(x) y = sin(x) y = cos(x) y = tan(x) Standard Operators: + - addition and unary positive - - subtraction and negation * - multiplication / - division ! - factorial ** - pow, exponentiation sqrt(x) - square root cuberoot(x) - cubic root Standard parameters (constant): phi - returns the value of ϕ (the Golden Ratio). Also recognized as ϕ() pi - returns the value of π. Also recognized as π() pi_2 - returns the value of π/2 pi_4 - returns the value of π/4 tau - returns the value of τ. Also recognized as τ() sqrt2 - returns the value of the square root of 2 e - returns the value of e log2e - returns the value of the log base 2 of e log10e - returns the value of the log base 10 of e ln2 - returns the value of the log base e of 2 ln10 - returns the value of the log base e of 10 Standard Functions that take 1 parameter: sqrt() - returns the square root of the passed parameter log() - returns the base 10 log of the passed parameter ln() - returns the base e log of the passed parameter log2() - returns the base 2 log of the passed parameter ceil() - returns the passed parameter rounded up floor() - returns the passed parameter rounded down Trigonometric functions: sin(), cos(), tan() Their inverses (asin, acos, atan, atan2) Their reciprocals (csc, sec, cotan) The reciprocals of the inverses (acsc, asec, acotan) The hyperbolic variations of all the above functions (sinh, cosh, tanh, asinh, acosh, atanh, csch, sech, cotanh, acsch, asech, acotanh) The versine functions (versin, vercosin, coversin, covercosin, haversin, havercosin, hacoversin, hacovercosin, exsec, excsc, crd) dtor() - converts the passed parameter from degrees to radians rtod() - converts the passed parameter from radians to degrees Quick Start: 1. Tap on [+] button. 2. Change the equation of the line to y=3x+1 and see graphed. 3. You can also enter equations that are not solved for x e.g. x=2y+2 About Graph Calculator In mathematics, the graph of a function f is the set of ordered pairs (x,y), where f(x)=y. In the common case where x and f(x) are real numbers, these pairs are Cartesian coordinates of points in two-dimensional space and thus form a subset of this plane. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Screenshots
Verdict
The clearest difference is price: AirChord at Free against Graph Calc Plus's $2.99. AirChord also leads on update cadence (every 5 months vs every 39 months). Graph Calc Plus's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement 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
AirChord is free to download; Graph Calc Plus costs $2.99 up front. AirChord sells 2 one-off in-app purchases. Graph Calc Plus asks for nothing beyond the download.
AirChord ships an update every 5 months, Graph Calc Plus every 39 months. The most recent releases landed on September 19, 2026 and December 13, 2025 respectively.
| Parameter | AirChord | Graph Calc Plus |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.6 (99 ratings) — better | — |
| Positive reviews | 81.6% of reviews | — |
| Number of ratings | 99 — better | — |
| Update frequency | Every 5 months — better | Every 39 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 14.0 — better |
| Further details — not scored | ||
| Size | 65 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Kevin Kelly | Heng Jia Liang |
Bugs and requests
AirChord
Reported bugs
24 issues- Sound drops since last update
- App crashes frequently
- Audio connection sometimes fails
- Does not work with Sonos USB-C adapter
- No input selection available
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- Only picks up microphone audio
- Limited to Airplay 1
- Can only select one HomePod
- Voiceover audio is passed through to output
- Does not work on multiple Airplay speakers
- Lowest volume setting is still loud
- Only streams a single channel of audio
- 3 to 4 seconds delay between sound and image
- Requires additional adapters
- Stereo not supported unless using tricks
- Missing Airplay 2 support
- Not good for watching TV or playing video games
- Setup can be tricky
- Requires external ADC
- No input select
- Doesn't switch from mic to 1/8” Jack automatically
- Seems this no longer works with a turntable that has USB B
- Stuttering sound since last update
- Sound drops
Requested features
10 requests- Expand album art to full screen
- Album art visualiser
- Improve Siri integration for output selection
- Support for multi-speaker Airplay 2
- Add Airplay 2 support for stereo pairs
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- Add input meter
- Large portrait volume control with output levels
- Support stereo pairs for HomePods
- Full Airplay 2 support
- Update for stereo pairs
Graph Calc Plus
Not enough reviews yet to summarise bugs or requests.
In-app purchases
AirChord
- $0.99 tip$0.99
- $9.99 tip$9.99
Graph Calc Plus
No in-app purchases
Questions
Is AirChord free?
Is Graph Calc Plus free?
Do AirChord or Graph Calc Plus have ads?
Which is updated more often, AirChord or Graph Calc Plus?
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