Devil Spring Reverb vs Shimmer Delay Ambient Machine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Devil Spring Reverb
This app emulates the sound of a vintage tube amp's spring reverb, offering a warm, analog feel. It utilizes impulse responses and a custom convolution engine for realistic soundscapes, usable as a standalone application or within a DAW.
- AUv3 support
- 38 spring reverb impulse responses
- Optimized convolution engine
- Adjustable tone and reverb length
- Standalone app functionality
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Boing Boing makes my old tube amp when I move it or when I wildly unplug my jack! Well now, you just have to move your favorite DAW to hear the evil melody of the wiggling spring. It's vintage and It's very warm. All the sounds come from impulse responses grappled on the web. They've been cleaned up and I've been working on a convolution reverb algorithm optimized with small onions (french expression to said fine tuning). Can be used as standalone app too - AUV3 support - 38 spring reverbs impulse responses selected and cleaned - 3 levels of complexity (low and mid limit the audio bandwidth) - An optimized convolution engine that can go up to 4 seconds - A tone to adjust the brightness of the reverb - A tunable impulse response size (which also plays on the complexity) and a dry / wet mix to be able to go to extreme settings If you hear audio glitches, try to lower quality or decrease the reverb length or increase the buffer length in your daw parameter.
Shimmer Delay Ambient Machine
Create expansive soundscapes with this app that blends reverb, pitch shifting, and feedback. It's ideal for guitars, keys, synths, and vocals, offering real-time control and optimized performance for ambient electronic music production.
- Reverb, pitch shifting, and feedback effects
- Auto-swell for dynamic volume changes
- Real-time parameter control
- Optimized CPU usage
- Standalone, AUv3, and IAA support
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Based on creative techniques developed by studio engineers and producers in the early 1980s, Shimmer Delay Ambient Machine combines reverb, pitch shifting, and feedback to create out-of- this-world soundscapes and spaces. Great for guitars, keys, synths, samples, and vocals, Shimmer Delay Ambient Machine promotes getting lost in creative production and electronic music facets of the ambient spectrum. Swell crescendo means to start at a low volume and then swell to a much louder level, which is similar the sound of a violin being bowed. Now you get those sweeping swells from your guitar using the auto swell section of the Shimmer Delay Ambient Machine. The Shimmer Delay Ambient Machine user interface is designed with an emphasis on user control and playability. Shimmer Delay Ambient Machine has been designed to be tweaked in real time. All of the sliders have a smoothed response, to avoid clicks when changing settings or automating the controls. At the same time, the algorithm has been highly optimized, so you get a huge delay sound without straining your CPU. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect
Screenshots
Verdict
The clearest difference is rating: Shimmer Delay Ambient Machine at 5.0 against Devil Spring Reverb's 4.4. Shimmer Delay Ambient Machine also leads on review sentiment (67% vs 50%). Devil Spring Reverb's advantage is price ($3.99 vs $6.99). On ratings volume, update cadence, ads and in-app purchases 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
Devil Spring Reverb costs $3.99 and Shimmer Delay Ambient Machine $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Shimmer Delay Ambient Machine holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews point the same way: 50% of Devil Spring Reverb's written reviews are positive against 67% of Shimmer Delay Ambient Machine's.
Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on July 16, 2026 and September 21, 2026 respectively.
| Parameter | Devil Spring Reverb | Shimmer Delay Ambient Machine |
|---|---|---|
| Price | $3.99 — better | $6.99 |
| Rating | 4.4 (7 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 50.0% of reviews | 66.7% of reviews — better |
| Number of ratings | 7 — better | 4 |
| Update frequency | Every 5 months | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 87 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Julien Faure | Nembrini Audio |
Customer experience
Devil Spring Reverb
Shimmer Delay Ambient Machine
In-app purchases
Devil Spring Reverb
No in-app purchases
Shimmer Delay Ambient Machine
No in-app purchases
Questions
Is Devil Spring Reverb free?
Is Shimmer Delay Ambient Machine free?
Which has better reviews, Devil Spring Reverb or Shimmer Delay Ambient Machine?
Do Devil Spring Reverb or Shimmer Delay Ambient Machine have ads?
Which is updated more often, Devil Spring Reverb or Shimmer Delay Ambient Machine?
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