Voice sparks
Speak freely.
Keep the thought.
Record a voice note, choose your recording quality, and optionally turn speech into searchable text on your device.
00:12
Android app · v1.0
Never losea great idea.
Capture every thought by text or voice. SPARK keeps it private on your device — then brings it back when it matters.
On this deviceYour ideas stay local and private.
5.2 MBTiny Android download
100%Local-first storage
0Accounts required
3 formatsJSON, Markdown, ZIP
01 / MADE FOR IDEAS
Capture fast. Find it later. Keep full control.
Speak a thought, let SPARK bring forgotten ideas back, and move your whole vault whenever you want.
Speak freely.
Resurface
Worth another look.
Old and favorite sparks return when they deserve another chance.
STILL RELEVANT?A small idea from 3 weeks ago
Open it again, keep it close, or move it quietly to the archive.
KeepArchive
Portable by design
Your vault goes with you.
Export ideas as JSON or Markdown, or make a ZIP backup with audio.
Storage on this device
02 / ORGANIZE
One thought. Four clear stages.
ACTIVE
Ideas in motion and ready for your attention.
DEVELOPING
Thoughts you are shaping into something clearer.
BUILT
Sparks that became real, kept in your archive of work.
ARCHIVED
Out of the way without being lost.
03 / THE DIFFERENCE
Less setup. More ownership.
SPARK combines the things idea capture should have from the start: no account, on-device privacy, voice transcription, useful resurfacing, and a tiny footprint.
| Feature | SPARK | Google Keep | Notion | Evernote | Obsidian | Apple Notes |
|---|---|---|---|---|---|---|
| Free option | ✓ | Free | Free tier | Limited free tier | Personal use | Free |
| No account | ✓ | × | × | × | ✓ | × |
| 100% offline | ✓ | Partial | Limited | Moderate | ✓ | ✓ |
| Data on device | ✓ | Cloud sync | Cloud | Cloud | ✓ | iCloud |
| Voice transcription | Local | Voice notes + transcript | AI Meeting Notes | No direct match | Plugins | iOS 18+* |
| Idea resurfacing | ✓ | × | × | × | × | × |
| App footprint | ≈5.2 MB | Medium | 100 MB+ | Heavy | Medium | Built-in |
| Android | ✓ | ✓ | ✓ | ✓ | ✓ | × |
SIDE-BY-SIDE ON MOBILE · SPARK STAYS IN THE MIDDLE
SPARKVSGoogle Keep
| Free option | Yes | Free |
|---|---|---|
| Account | None | Required |
| Offline | 100% | Partial |
| Storage | On device | Cloud sync |
| Voice | Local transcript | Voice + transcript |
| Resurfacing | Built in | × |
| Footprint | ≈5.2 MB | Medium |
| Android | Yes | Yes |
SPARKVSNotion
| Free option | Yes | Free tier |
|---|---|---|
| Account | None | Required |
| Offline | 100% | Limited |
| Storage | On device | Cloud |
| Voice | Local transcript | AI Meeting Notes |
| Resurfacing | Built in | × |
| Footprint | ≈5.2 MB | 100 MB+ |
| Android | Yes | Yes |
SPARKVSEvernote
| Free option | Yes | Limited tier |
|---|---|---|
| Account | None | Required |
| Offline | 100% | Moderate |
| Storage | On device | Cloud |
| Voice | Local transcript | No direct match |
| Resurfacing | Built in | × |
| Footprint | ≈5.2 MB | Heavy |
| Android | Yes | Yes |
SPARKVSObsidian
| Free option | Yes | Personal use |
|---|---|---|
| Account | None | None |
| Offline | 100% | 100% |
| Storage | On device | On device |
| Voice | Local transcript | Plugins |
| Resurfacing | Built in | × |
| Footprint | ≈5.2 MB | Medium |
| Android | Yes | Yes |
SPARKVSApple Notes
| Free option | Yes | Free |
|---|---|---|
| Account | None | Apple ID |
| Offline | 100% | Yes |
| Storage | On device | iCloud |
| Voice | Local transcript | iOS 18+* |
| Resurfacing | Built in | × |
| Footprint | ≈5.2 MB | Built-in |
| Android | Yes | × |
The only combination like this in the comparison.Free + no account + fully offline + local voice transcription + forgotten-idea resurfacing, all in about 5.2 MB.
Comparison snapshot researched 13 October 2026. SPARK details come from direct app inspection; competitor facts were compiled from AIToolPick, ClickUp and RateTheTool, with voice-capability clarifications from official product documentation. Features vary by plan, version, device and language; Apple Notes transcription requires a compatible device/language on iOS 18 or later. “Partial,” “limited,” “moderate” and app-size descriptions retain the source comparison’s caveats.
04 / PRIVATE BY DEFAULT
Your ideas stay yours.
SPARK keeps its vault local-first. Ideas live in a SQLite database on your device, and voice recordings stay there too.
Storage-on-this-device indicator
Optional local voice transcription
Audio-only mode with no transcription
Backup with audio available as ZIP
Ideas worth keeping.
Download SPARK v1.0 for Android. The APK is approximately 5.2 MB.
Verified from the supplied app: identity, version, approximate file size, features, permissions, and interface copy were checked directly from SPARK.apk v1.0 on 13 October 2026. The phone uses the real SPARK home-screen capture supplied for this page.