Comparison

FlangeII vs TETSUO

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

Head to head
About

FlangeII

This audio effect plugin offers a dual stereo flanger with a vintage sound. It provides flexible routing options like parallel and series, alongside adjustable rate, depth, width, and drive for a wide range of modulated effects. Soft limiting is included to prevent clipping.

Highlights
  • Dual stereo flanging
  • Vintage vibe
  • Parallel and series routing
  • Adjustable rate and depth
  • Stereo width control
  • Optional drive for warmth
  • Soft limiting for clipping prevention
Read full description

FlangeII Dual Stereo Flanger Plugin (AUv3) FlangeII is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic Pro, GarageBand or AUM. Overview FlangeII is a dual stereo flanging machine with a vintage vibe! As well as traditional super-wide stereo flanging effects, FlangeII can also produce all manner of swirly modulated goodness by running the independent flanging engines in parallel or series. Selectable modes allow quick access to finely-tuned settings under the hood that "just work", from subtle to extreme - just the thing if you find some flangers to be overly complex with too many parameters! Set Rate and Depth to taste, adjust the stereo Width, then you can even add some gritty Drive for some "analog" warmth. Controls Active - Bypasses the effect (Off) or selects one of the following processing modes: Stereo - Two independent flangers for the left and right channel, with LFOs 90 degrees out of phase for a stereo effect, determined by the Width control. Parallel - Two independent stereo flangers for the incoming audio, which are then summed together at the output stage. The LFOs for each of the four flangers are 90 degrees out of phase for a stereo effect, determined by the Width control. Series - Two independent stereo flangers with Flange I processing incoming audio, which is then passed on to Flange II for a double-helping of flangey goodness at the output stage! This is potentially the most dramatic flanging effect, especially with the Width set to maximum as each of the four flanger LFOs are 90 degrees out of phase. The following controls apply to each flanging stage, referred to as Flange I or Flange II: Flange I/II - Toggles the Flange I or Flange II processing engine On or Off. Rate - Sets the rate of the flanger LFO in Hz. Depth - Sets the depth of the flanging effect. Mode - Selects one of four different modes. Each mode configures several "under the hood" settings - think of each mode as a mini preset for internal parameters. Modes range from subtle (I) to extreme! (IV). The following controls are global: Width - Adjusts the stereo width from super-wide to monophonic. Note this only adjusts the "wet" flanged sound so your original stereo image remains intact for the "dry" signal. Drive - Applies an optional amount of warm overdrive to the flanger processing only, for a bit of a vintage vibe! Mix - Balances the processed audio with the incoming / dry signal. At zero, the output is totally dry, and at 100%, the output is totally wet and flanged to the max! The flanging effect can sometimes create loud resonant frequency peaks that could result in clipping. To protect against this, soft limiting is applied at both the flanging processing stage and at the final summed output. If the input levels are high, this can add to the "analog" like sound of FlangeII when compression and saturation occurs. About The UI Not everyone likes the UIs of my latest (2025) plugins - I get it. However, the simplistic and generic approach allows me to (a) 99% focus on the DSP, sound quality and CPU performance, and (b) significantly reduce the development (and potential maintenance) time, which is reflected in my pricing. For more info and support please visit: www.waverley-instruments.com/robjackson

About

TETSUO

Read full description

TETSUO is a chaotic percussion machine. No samples, no library. One voice built out of a pitched body with noise dragged through it, a resonant filter that saturates the harder you lean on it, a bitcrusher, and a waveshaper that runs from a bit of weight to total structural failure. The sequencer is sixteen unseen slots and STEPS knob decides how many of them fire, adding and taking away hits one at a time in a fixed order, so you can strip a pattern to the bone and build it back and the same beats come home. The SKIP control works against you on purpose, stealing hits at random while it plays, so it never quite settles. MUTATE modulates the pitch at random, setting fire to voices on every turn. You do not program TETSUO so much as negotiate with it. The strip along the top is how you attempt to hold onto anything. Sixty four steps, four turns of pattern, carved into as many as eight sections. Select a section. Find a sound. Hit RECORD, and that section keeps every knob position. Change it, record the next, then hit PLAY and it walks left to right dropping each snapshot in as it reaches it, looping. Drag the dividers to give a section longer or cut it short. It keeps settings, not audio, so the engine is playing live the entire way through. Sections save with your presets and your session. AUv3 and standalone.

Screenshots

FlangeII4 screens
TETSUO4 screens

Verdict

The call

The clearest difference is price: FlangeII at $1.99 against TETSUO's $9.99. FlangeII also leads on iOS requirement (12.0 vs 15.6). On ads, in-app purchases 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

FlangeII costs $1.99 and TETSUO $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 7 level
FlangeII versus TETSUO: the parameters behind the verdict, then further details
ParameterFlangeIITETSUO
Price$1.99 — better$9.99
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 6 days—
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size13 MB29 MB
Age rating4+4+
DeveloperRob JacksonAnthony Moran

In-app purchases

None

FlangeII

No in-app purchases

None

TETSUO

No in-app purchases

Questions

Is FlangeII free?
FlangeII costs $1.99, with no in-app purchases.
Is TETSUO free?
TETSUO costs $9.99, with no in-app purchases.
Do FlangeII or TETSUO have ads?
Neither FlangeII nor TETSUO shows ads.

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