Plottron vs AudioLane

A graphing + scientific calculator. • 2D and 3D graphing Graphs regular functions, parametric relations, and functions in polar/spherical coordinates. • Implicit graphing • Visualization of complex maps w=f(z) featuring domain coloring plots • For 2D functions: Info mode with tangent line and 2nd-order Taylor approximation Scientific calculator features: • User-defined variables and functions • Symbolic derivative (e.g.: D(x, sin(x)) • nCr, nPr, factorial • Complex numbers • Live evaluation (calculate as you type) • Calculation history • Probability density functions: Binomial, Normal (Gaussian), Student’s t • Cumulative probability density functions • Inverse CDF functions: Normal (Gaussian), Student’s t Examples: Implicit graph: cos(X)=sin(Y) Graph a parabola in Regular mode: X^2 Graph a circle in Parametric mode: cos(T);sin(T) Set a variable: X=5 Use a variable: X+4: 9 Define a function: f(X)=X+1 Use a defined function: f(2): 3 Symbolic derivative: D(X,sin(X)): cos(X) Complex magnitude plot in 3D Regular mode: abs(1/cos(X+Yi)) Notes: • Swipe left for settings. • Use semicolon (;) to separate functions in parametric relations. • Swipe down on keypad to show full history. Tap on answer to show keypad again.

Turn videos you own or are authorized to use, Voice Memos, recordings and audio files into ready-to-use audio—privately on your iPhone and iPad. AudioLane gives every file a clear path: import, inspect, trim, edit, convert and export. Your media stays on your device. No account, no media upload and no ads. CONVERT AND EXTRACT • Extract audio from videos selected from Photos or Files, then export it as MP3. • Convert compatible local media to MP3, M4A, WAV or M4R. • Record audio directly in the app, with pause and resume. • Convert a selected audio or video file to MP3 with Shortcuts. EDIT BEFORE EXPORT • Trim precisely with an interactive waveform and time controls. • Keep multiple segments, reorder them and export them as one file. • Adjust volume, fades, speed, pitch, three-band EQ and reverb. • Apply practical voice tools including noise gating, auto gain, voice enhancement and stereo vocal reduction. • Merge multiple audio files sequentially or as an overlapping mix. CONTROL THE OUTPUT • Choose Voice, Standard, Music or High quality presets. • Set bitrate, sample rate and mono or stereo output where supported. • Add title, artist, album, genre, year and notes to supported output formats. • Batch export recent projects with clear progress and retry failed items. • Create an M4R ringtone from a clip up to 30 seconds. FILES YOU CAN FIND Finished files are saved in AudioLane’s Exports folder in the Files app. You can also choose another Files location or share the result with any compatible app. PRIVATE BY DEFAULT Conversion and editing happen on your device. AudioLane does not require an account, upload your media, download from streaming services or bypass DRM protection. Start with 5 free exports—use them anytime. Once used up, get 1 free export per day starting the next day. AudioLane Core Pro unlocks unlimited exports, batch features and advanced output controls. Available products and prices are shown by the App Store before purchase.