# Digitron Synthesizer vs Sightlines

The clearest difference is price: Digitron Synthesizer at Free against Sightlines's $7.99. Digitron Synthesizer also leads on update cadence (daily vs every 5 days). Sightlines's advantage is in-app purchases (none vs 3) and chart position (#82 vs unranked). On ads and device support there is nothing between them.

Digitron Synthesizer is free to download; Sightlines costs $7.99 up front. Digitron Synthesizer sells 3 in-app purchases, starting at $0.99 per month. Sightlines asks for nothing beyond the download.

Digitron Synthesizer ships an update daily, Sightlines every 5 days. The most recent releases landed on September 19, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Digitron Synthesizer | Sightlines |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/sightlines-harmonic-filter/id6801937031/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 5 days |
| Monetization | — | Paid |
| Best chart rank | — | **#82** |
| Size | 117 MB | 18 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Evgenii Petrov](https://appshunter.io/developer/1778767431) | [Aqeel Aadam](https://appshunter.io/developer/1724235864) |

## What reviewers say

### Digitron Synthesizer

[App page](https://appshunter.io/ios/app/digitron-synthesizer/id6737997923)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Subscription Month | $0.99 | per month |
| Pro Subscription Year | $7.99 | per year |
| Pro Unlock | $9.99 | one-time |


### Sightlines

[App page](https://appshunter.io/ios/app/sightlines-harmonic-filter/id6801937031)

**Currently charting:** #82 Top Paid · Music (US App Store)

Shape sounds with a playable harmonic filter. Add motion, stereo spread, and unique textures to noise, samples, or synths. Tune it like a resonator or control it with MIDI for endless sonic possibilities.

**Highlights:** Harmonic filter bank, MIDI control, Sample loading, Noise and synth sound sources, Modulation capabilities, Built-in chorus, delay, and reverb

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Digitron Synthesizer free?

Digitron Synthesizer is free to download, with in-app purchases available.

### Is Sightlines free?

Sightlines costs $7.99, with no in-app purchases.

### Do Digitron Synthesizer or Sightlines have ads?

Neither Digitron Synthesizer nor Sightlines shows ads.

### Which is updated more often, Digitron Synthesizer or Sightlines?

Digitron Synthesizer ships an update daily, and Sightlines every 5 days. Most recently, Digitron Synthesizer was updated on September 19, 2026 and Sightlines on September 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*