SkinStack vs Convertor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SkinStack
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Stop guessing which products work together. SkinStack builds your perfect skincare routine and warns you about ingredient conflicts before they cause breakouts. BUILD SMART ROUTINES - Add your skincare products with ingredients - Get automatically sorted AM/PM routines based on texture and category - Know the correct layering order: water-based first, heavy creams last DETECT INGREDIENT CONFLICTS - Retinol + AHA = irritation? We'll warn you - Vitamin C + Niacinamide = safe? We'll confirm it - 20+ built-in conflict rules covering common ingredients - Avoid-level (never mix) and caution-level (use carefully) warnings - Synergistic pair detection (ingredients that work better together) SCAN INGREDIENT LABELS (PRO) - Point your camera at any product label - Vision OCR automatically reads and parses ingredients - Add scanned ingredients to your products instantly WAIT-TIME TIMER (PRO) - Know exactly how long to wait between products - Different wait times for different textures (60s for serums, 5min for oils) - Push notification when it's time for the next step SKIN JOURNAL (PRO) - Track your skin condition daily with emoji ratings - Log concerns like breakouts, dryness, redness - See your skin improvement trend over time - Connect products used to skin condition changes ONE-TIME PURCHASE, NO SUBSCRIPTION - Free: 3 products, basic conflict detection - Pro: $4.99 one-time — unlimited products, scanner, timer, journal - No recurring charges. Ever. WHY SKINSTACK? - 100% offline — your data stays on your device - No accounts, no tracking, no analytics - Built by skincare enthusiasts who got tired of guessing - One-time purchase beats monthly subscriptions Your skincare routine should work for you, not against you. Download SkinStack and start building smarter routines today.
Convertor
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Convertor is the all-in-one video, audio and voice studio for iPhone, iPad and Mac — turn MP4 into MP3, transcribe any video, isolate a voice, make ringtones, master a podcast, and share vertical clips in seconds. Everything runs on your device. No account. No uploads. No tracking. No ads. WHAT’S NEW IN 2.5 - Voice Isolation: FaceTime-grade denoise for interviews, calls and voice memos - Auto-Master: one-tap broadcast mastering chain — level, EQ, limit - Studio Rack: compressor, de-esser, gate, reverb, EQ — a full effects rack - Vocal Separator: split vocals from instrumental for karaoke prep - Live Transcribe: rolling captions for stages, meetings and lectures - Screen Record + mic: capture tutorials, gameplay, video calls - LUFS loudness: normalise for YouTube, Spotify, TV or podcasts - 9:16 vertical export: crop and burn subtitles for social clips - Smart Trim: automatically cut silence and filler words (um, uh) - Voice-over overlay: narrate on top of existing music - Mac Catalyst: Convertor now runs natively on your Mac - 30+ new audio effects: multiband compressor, sidechain ducker, tape saturator, chorus, flanger, pitch shift, reverse, vocoder and more WHAT YOU CAN DO - Convert MP4/MOV/MKV/WebM/M4V/HEVC to MP3, M4A, WAV, ALAC, AAC or ringtone - Compress video to MP4/MOV/M4V with HEVC preset - Make animated GIFs from any clip - Text-to-speech with system voices - Meeting mode with automatic chapter markers - AI voice cleanup, EQ presets, karaoke maker - Auto-trim silence, split by duration or chapters - Cover art from Photos, batch tag editor - Live waveform, playlists, bookmarks, iCloud sync - On-device transcription with SRT/VTT export WHY CONVERTOR - 100% on-device — no uploads, no accounts, no ads - Works offline, everywhere - Studio quality up to 320 kbps - 3-day free trial, cancel any time ——— Convertor Pro subscription (optional): - 3-day free trial, then Weekly $3.99 / Monthly $8.99 / Yearly $34.99 Payment is charged to your Apple ID at purchase confirmation. Subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel in Settings > Apple ID > Subscriptions. Terms of Use (EULA): https://birsoftware.com/terms.html Privacy Policy: https://birsoftware.com/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Convertor at none against SkinStack's 1. On price, ads, device support and iOS requirement 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
Both are free to download. SkinStack sells 1 one-off in-app purchase. Convertor asks for nothing beyond the download.
| Parameter | SkinStack | Convertor |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 4 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 17 | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 21 MB |
| Age rating | 9+ | 4+ |
| Developer | 贺 周 | Birkan Aksoy |
In-app purchases
SkinStack
- SkinStack Pro$4.99
Convertor
No in-app purchases
Questions
Is SkinStack free?
Is Convertor free?
Do SkinStack or Convertor have ads?
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