Education · head to head
Gaggle vs Sky Guide
Gaggle
Education
Human-reviewed student safety monitoring across school email, documents and drive files
- From
- On request
- Rated
- -
Sky Guide
Education
iOS astronomy app that moved from a one-time purchase to a free-to-download, subscription-tiered model
- From
- Free
- Rated
- -
The short version
- Only Sky Guide has a free tier, so it costs nothing to try first.
- Each has a real cost: Gaggle pricing is quoted per student per year with no published rate, and because it is charged on total enrolment rather than on accounts actually monitored, small districts pay a markedly higher effective rate than large ones.; Sky Guide it is iOS-only, unlike SkySafari which also covers Android and desktop.
- They diverge on capability: Gaggle covers Content scanning, Sky Guide covers Light pollution forecasting.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Gaggle and Sky Guide actually diverge.
Identical on both: user rating (Not yet rated), category (Education).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Gaggle
- Content scanning
- Trained human review
- Phone escalation
- SpeakUp for Safety
- Web filter safety integration
- Incident reporting
- Google and Microsoft coverage
- District-scoped contacts
Only in Sky Guide
- Light pollution forecasting
- Meteor shower prediction
- Camera and gyroscope sky view
- Deep-sky object catalogue
- Extreme zoom
- Satellite tracking
What people use each for
The jobs each tool is most often brought in to do.
Gaggle
- A district whose board has adopted a suicide prevention policy that requires someone to act on a written disclosure within hours, at any time of yearnot Sky Guide
- A district with no counselling capacity to triage automated alerts and that would otherwise ignore themnot Sky Guide
- A district already running a web filter that produces safety signals nobody reads, wanting them routed to a staffed review servicenot Sky Guide
- A district responding to a specific incident where a warning sign existed in a student document and nobody saw itnot Sky Guide
Sky Guide
- An iOS stargazer who wants light pollution forecasting to plan a dark-sky observing tripnot Gaggle
- Someone tracking meteor showers and wanting a forecast of viewing conditionsnot Gaggle
- A user who wants extreme zoom into deep-sky objects without owning a telescopenot Gaggle
- A buyer comparing subscription astronomy apps on iOS specifically, rather than cross-platform toolsnot Gaggle
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Gaggle
- Pricing is quoted per student per year with no published rate, and because it is charged on total enrolment rather than on accounts actually monitored, small districts pay a markedly higher effective rate than large ones.
- False positives are structural, not a tuning problem: fiction assignments, song lyrics, health coursework and jokes between friends all trigger review, and each escalation consumes counsellor time the district funds itself.
- The service reads children's private writing on school accounts, and civil liberties groups have documented cases where flagged content led to outing LGBTQ students or to discipline rather than support, which is a governance risk a board must accept explicitly.
- Coverage is limited to district-issued accounts, so a student using a personal phone, a personal email address or an encrypted messaging app is invisible, which is where much of the behaviour the district worries about actually happens.
- Escalation depends on the district maintaining accurate contact lists and staff who answer calls; when a named contact leaves and the list is stale, the service escalates into a void and the district only discovers it after an incident.
Sky Guide
- It is iOS-only, unlike SkySafari which also covers Android and desktop.
- It has moved from one-time purchase to a subscription model, and long-time users who paid once for earlier versions have criticised the change publicly.
- Pro tier pricing is high relative to Star Walk 2 for broadly similar core stargazing functionality.
- It has no telescope control, unlike SkySafari Plus and Pro, which limits it to naked-eye and camera-based observing.
- Its relationship to other apps under the same distribution platform is not clearly documented, which makes long-term support commitments harder to assess.
Pricing, plan by plan
Gaggle
On request- Gaggle Safety Management$undefined/year
- Machine plus human review of student email, documents and files
- Escalation to district contacts including out of hours
- SpeakUp for Safety tipline included
Sky Guide
Free- Sky GuideFree
- Base sky map and object labelling
- Sky Guide Plus$19.99/year
- Larger star and satellite catalogue
- Light pollution forecasting
- Meteor shower prediction
- Sky Guide Pro$39.99/year
- Very large deep-sky object catalogue
- Exoplanet data
- Extreme zoom
Which should you pick?
Choose Sky Guide if
- You need light pollution forecasting.
- You want to start without paying.
- You work on iOS.
- You also want meteor shower prediction.
Questions people ask
- Is Gaggle or Sky Guide better?
- Neither clearly leads. Gaggle starts at On request and Sky Guide at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Gaggle or Sky Guide?
- Sky Guide has a free tier; the other does not. Paid plans start at On request for Gaggle and Free for Sky Guide.
- Does Gaggle or Sky Guide run on more platforms?
- Gaggle runs on Web. Sky Guide runs on iOS.
- Can I use Sky Guide for free?
- Yes. Sky Guide has a free tier, so you can try it without paying. Gaggle starts at On request.
- What is Gaggle best used for?
- Gaggle is most often used for a district whose board has adopted a suicide prevention policy that requires someone to act on a written disclosure within hours, at any time of year, a district with no counselling capacity to triage automated alerts and that would otherwise ignore them, a district already running a web filter that produces safety signals nobody reads, wanting them routed to a staffed review service, a district responding to a specific incident where a warning sign existed in a student document and nobody saw it. Of those, a district whose board has adopted a suicide prevention policy that requires someone to act on a written disclosure within hours, at any time of year and a district with no counselling capacity to triage automated alerts and that would otherwise ignore them are not what Sky Guide is typically brought in for.
- What can Gaggle do that Sky Guide cannot?
- Gaggle covers Content scanning, Trained human review, Phone escalation, SpeakUp for Safety. Sky Guide covers Light pollution forecasting, Meteor shower prediction, Camera and gyroscope sky view, Deep-sky object catalogue.
Answered from the vendors’ own pages
Gaggle: How much does Gaggle cost?
It is quoted per student per year based on enrolment and requirements. No rate card is published, and effective rates fall substantially with district size.
Sky Guide: Is Sky Guide free?
The base app is free to download; Plus and Pro are subscription upgrades for a larger catalogue and forecasting features.
Gaggle: Is the tipline an extra charge?
No longer. From 1 July, districts on the full Safety Management solution get SpeakUp for Safety and the web filter safety integration at no additional cost; each previously carried a per-student charge.
Sky Guide: Did Sky Guide used to be a one-time purchase?
Yes, earlier versions were sold as a one-time purchase before it moved to the current free-plus-subscription model.
Gaggle: Do humans read every alert?
Trained reviewers assess flagged items before escalation. That human layer is the core of the service, not an optional tier.
Sky Guide: Does Sky Guide support telescope control?
No. For telescope control, SkySafari Plus or Pro is the better choice.
Gaggle: Does it monitor personal accounts or phones?
No. It covers district-issued Google or Microsoft accounts. Personal devices, personal accounts and encrypted apps are outside its reach.
Gaggle: What are the privacy obligations?
Districts sign a data processing agreement covering FERPA and applicable state student privacy law. Negotiate retention and scope in that document rather than relying on the marketing page.
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