Otto Voice vs Spools
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Otto Voice
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Otto is your AI voice assistant for email and calendar. Talk to your inbox the way you'd talk to a person β archive, draft, send, schedule, and prioritize, all hands-free. WHAT YOU CAN DO Manage email by voice Ask Otto to read your latest message, draft a reply, send it, or archive it. No typing, no swiping, no thumb gymnastics. Find what actually matters Ask "What's my most important email?" and Otto surfaces the messages that need you β not the newsletters, receipts, and noise. Run your calendar without lifting a finger "Create an event for Thursday at 3 with Sarah." "What's on my calendar tomorrow?" "Move my 2pm to 4." Otto handles your Google Calendar the same way it handles your inbox. Set rules that work in the background Tell Otto "always archive promotional emails from Sephora" or "always archive emails that look like recruiter outreach," and Otto keeps your inbox clean even when the app is closed. PERFECT FOR - Walks, workouts, and time outside - Commutes on transit or as a passenger - Cooking, chores, and anything where your hands are busy - Inbox-zero people who want a faster way to triage PRIVACY AND CONTROL Otto connects to your Gmail and Google Calendar through Google's official sign-in. You stay in control: Otto only accesses what's needed to help you, and you can disconnect anytime from your Google account settings. Download Otto and start talking to your inbox.
Spools
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The feed moves fast. What you saw is gone before you know it. Spools helps you keep what matters. Save posts from your feed and turn them into your own personal archive. No more searching, no more losing things you meant to come back to. β Save in seconds Quickly capture posts while you scroll. β Build your archive Everything you save stays organized and easy to find. β Always yours What you save doesnβt disappear. Keep it for as long as you want. Spools turns endless scrolling into something you can actually keep.
Screenshots
Verdict
The clearest difference is in-app purchases: Spools at none against Otto Voice's 1. Otto Voice's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price, update cadence and ads there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Otto Voice sells 1 in-app purchase, starting at $4.99 per month. Spools asks for nothing beyond the download.
Otto Voice ships an update every 3 weeks, Spools monthly. Both last shipped on November 5, 2026.
| Parameter | Otto Voice | Spools |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks β better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 15.1 β better | 26.0 |
| Further details β not scored | ||
| Size | 60 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | ERIC ROBERT SAMORE | euca |
In-app purchases
Otto Voice
- Otto Voice Monthly7 Days trial$4.991 Month
Spools
No in-app purchases









