QuantLapse vs Syntesia Ai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuantLapse
This app helps you visualize progress over time by creating timelapse videos from daily photos and optional metric logs. It offers perfect alignment, smart insights, and shareable exports, all while prioritizing user privacy with offline functionality.
- Perfect photo alignment overlay
- Log custom metrics alongside photos
- Automatic trendlines and insights
- Shareable timelapse videos
- Offline-first functionality
- Privacy-focused data storage
Read full descriptionHide full description
QuantLapse turns daily check ins into visible progress. It is hard to remember how far you have come. TimeLapse Tracker makes it easier. Take a photo, log a number (optionally), and do it again tomorrow. Over weeks and months, the app stitches these moments into a timelapse video so you can actually watch your progress and see your data trends over time. WHAT YOU GET Perfect Alignment: An overlay helps you line up your daily photos perfectly every time. Track Anything: Log your weight, calories, reps, mood, or any custom metric right next to your photo. Smart Insights: Automatic trendlines, streaks, personal records, and weekly analysis. Shareable Exports: Generate timelapse videos, before and after photos, and photo grids. Offline First: Your data lives on your device. The app works fully offline. FLEXIBLE BY DESIGN Not everyone wants to track numbers. Skip the metrics entirely and TimeLapse Tracker works as a pure visual photo journal. Want to track multiple things? Premium unlocks unlimited metrics and unlimited timelapses. You can run a fitness log, track a plant growing, and document a home renovation all in one app. PRIVACY FIRST Your photos stay on your device. Sync is totally optional and encrypted to your account. We have no ads, no tracking pixels, and we never sell your data. PREMIUM Upgrade to unlock: • Unlimited timelapses • Unlimited metrics per timelapse • Cloud sync across devices • Watermark-free exports Start free. Upgrade when you are ready. Terms of Use: https://lapse.quantdays.com/terms Privacy Policy: https://lapse.quantdays.com/privacy
Syntesia Ai
Create engaging videos with digital avatars and natural voices. Choose from a variety of avatars and voices, customize scripts, and generate finished videos easily. Manage your creations and bring your ideas to life.
- Digital avatar selection
- Natural-sounding voice library
- Customizable script creation
- Video generation
- Video history management
- Multiple voice styles and languages
Read full descriptionHide full description
Turn your ideas into engaging videos using digital avatars, natural-sounding voices, and customizable scripts. Choose an avatar and voice, add your message text, and create a finished video in just a few simple steps. Experiment with voice options, build your own avatar collection, and manage your created videos all in one convenient place. Key features: Avatar selection Choose the digital avatar that best fits the style and mood of your video from a wide selection. Voice library Select from male and female voices featuring various speech styles and languages. Script creation Add your own text and prepare a script for your video. Script refinement Edit and polish your text before generating the final video. Video creation Combine your avatar, voice, and script to produce a finished video. Video history View previously created videos, track their status, and easily organize your content. With Syntesia, it’s easy to bring stories, ideas, and messages to life through expressive avatar-based videos. Subscription information: Subscription payment: Subscription fees are charged to your iTunes account upon purchase confirmation and at the start of each subsequent renewal period. Subscriptions renew automatically unless cancelled. Subscription cancellation: You can cancel your subscription in your iTunes account settings at least 24 hours before the current subscription period ends. Cancellation takes effect the day after the current period concludes, and your account will revert to the free version of the service. Privacy Policy: https://docs.google.com/document/d/1IpAtfXtnOZrCp4wq8bVIkVPVoa5Xe43kVw1ZHlyJvhk/edit?usp=sharing Terms of Use: https://docs.google.com/document/d/1du2Qlk_XLdU6xgR83jvQCIzJcslyvRIIl_5AMtVxsj0/edit?usp=sharing
Screenshots
Verdict
The clearest difference is in-app purchases: QuantLapse at none against Syntesia Ai's 9. QuantLapse also leads on rating (5.0 vs 4.6) and iOS requirement (16.0 vs 18.0). Syntesia Ai's advantage is ratings volume (54 vs 2) and update cadence (every 3 days vs weekly). On price, ads, monetization model 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
Both are free to download. Syntesia Ai sells 9 in-app purchases, starting at $4.99 per 7 days. QuantLapse asks for nothing beyond the download.
QuantLapse holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Syntesia Ai has 54 ratings behind it against 2, so its average is the more settled of the two.
QuantLapse ships an update weekly, Syntesia Ai every 3 days. The most recent releases landed on October 31, 2026 and November 8, 2026 respectively.
| Parameter | QuantLapse | Syntesia Ai |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.6 (54 ratings) |
| Positive reviews | — | 96.0% of reviews |
| Number of ratings | 2 | 54 — better |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 62 MB | 42 MB |
| Age rating | 4+ | 17+ |
| Developer | BLAKE ASHER SHARP | Martin Yordanov |
Customer experience
QuantLapse
Syntesia Ai
In-app purchases
QuantLapse
No in-app purchases
Syntesia Ai
- Premium Weekly$4.997 Days
- Premium Weekly$6.997 Days
- Premium Yearly3 Days trial$49.991 Year
Show 1 moreShow fewer
- Premium Yearly$49.991 Year
- Tokens$9.99
- Tokens$19.99
- Tokens$34.99
Show 2 moreShow fewer
- Tokens$59.99
- Tokens$99.99









