Comparison

Otto Voice vs Spools

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Otto Voice

Features
Read full description

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.

About

Spools

Features
Read full description

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 doesn’t disappear. Keep it for as long as you want. Spools turns endless scrolling into something you can actually keep.

Screenshots

Otto Voice3 screens
Spools3 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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.

UpkeepUpdate frequency

Otto Voice ships an update every 3 weeks, Spools monthly. Both last shipped on November 5, 2026.

Scorecard3 real differences Β· 3 level
Otto Voice versus Spools: the parameters behind the verdict, then further details
ParameterOtto VoiceSpools
PriceFreeFree
Update frequencyEvery 3 weeks β€” betterMonthly
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS15.1 β€” better26.0
Further details β€” not scored
Size60 MB2 MB
Age rating17+4+
DeveloperERIC ROBERT SAMOREeuca

In-app purchases

1 purchases

Otto Voice

Subscriptions1
  • Otto Voice Monthly7 Days trial$4.991 Month
None

Spools

No in-app purchases

Questions

Is Otto Voice free?
Otto Voice is free to download, with in-app purchases available.
Is Spools free?
Spools is free to download, with no in-app purchases.
Do Otto Voice or Spools have ads?
Neither Otto Voice nor Spools shows ads.
Which is updated more often, Otto Voice or Spools?
Otto Voice ships an update every 3 weeks, and Spools monthly. Most recently, Otto Voice was updated on November 5, 2026 and Spools on November 5, 2026.

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