Garmin Forerunner 70 vs Forerunner 55: Which Running Watch Should You Choose?

Comparison of the Garmin Foreruunner 70 and Forerunner 55

Choose the Garmin Forerunner 70 if you will use richer training and recovery guidance and want a brighter touchscreen for everyday wear. Choose the Garmin Forerunner 55 if you mainly need dependable run tracking and the saving matters more. The deciding factor is whether the newer watch’s feedback will change how you train between runs.

The short version

The Forerunner 70 gives an improving runner more room to grow, while the Forerunner 55 covers the essentials without making you pay for feedback you may ignore.

• Choose the Forerunner 70 for training decisions: Training Readiness, Training Status and Training Load give you more context for deciding whether to push, recover or adjust your plan.
• Choose the Forerunner 55 for straightforward run tracking: it still provides Daily Suggested Workouts, recovery time and PacePro, so it is not stripped of useful running guidance.
• The Forerunner 70 is easier to live with away from a run: its brighter AMOLED touchscreen is more pleasant for quick checks, although physical controls remain available.
• GPS endurance is close: the Forerunner 70 lasts up to 23 hours in GPS use, while the Forerunner 55 lasts up to 20 hours.
• The price gap needs a purpose: the Forerunner 70 is worth more when its recovery feedback or course navigation will affect your routine. Otherwise, the Forerunner 55 is the better-value tool.

Garmin Forerunner 70 vs Forerunner 55 specifications compared

The decisive specification is the Forerunner 70’s deeper training and recovery layer, not its small advantage in GPS endurance.

Prices were read at the time of writing and can change with retailer promotions.

The trade that decides everything: pay more for the Forerunner 70 only if its deeper feedback will influence what you do between runs; choose the Forerunner 55 if recording the run is the main job.

Training and recovery guidance

The Forerunner 70 is the better training companion because it explains your wider workload and readiness rather than concentrating mainly on the next session.

Training Load helps put recent work into context, while Training Status and Training Readiness are designed to inform the push-or-rest decision. That combination suits you if you train to a plan, run several times a week or tend to add hard sessions whenever you feel motivated. The value is not having more data for its own sake. It is having a reason to reconsider today’s effort.

The Forerunner 55 is simpler, but it is still useful for a new or casual runner. Daily Suggested Workouts provide session ideas, recovery time helps you judge the gap before another effort, and PacePro can support paced running. If you mainly want some structure around regular runs, that may be all the guidance you need.

This is where the comparison really separates. A runner who checks readiness before choosing a workout will notice the Forerunner 70 every week; someone who starts the same familiar run regardless will get much less from the upgrade.

Display and controls

The Forerunner 70 has the more attractive everyday display, combining a brighter AMOLED touchscreen with the physical buttons runners still need.

Its 1.2-inch panel has a resolution of 390 x 390 pixels, making watch faces, menus and training information easier to read at a glance. Touch control also feels natural when you are checking information during the day or moving through menus before a session.

The Forerunner 55 uses a 1.04-inch MIP display with a resolution of 208 x 208 pixels. It is operated through its buttons rather than touch. That is not automatically a disadvantage during exercise: buttons give clear, deliberate inputs when your hands are damp or you are trying to record a lap without staring at the screen.

The Forerunner 70 also retains 5-button control, so choosing its touchscreen does not mean relying on swipes while running. In daily wear, the larger, brighter panel is the difference you will see most often; during a run, both watches still give you practical button control.

Garmin Forerunner 70 vs Forerunner 55: battery life

The Forerunner 70 lasts longer while recording with GPS, but the advantage is modest enough that battery life should not decide this comparison on its own.

Garmin rates the Forerunner 70 for up to 23 hours of GPS use. The Forerunner 55 reaches up to 20 hours. Both therefore have enough quoted recording time for normal training weeks, long runs and events where you are not approaching their maximum duration.

The order reverses in smartwatch use. The Forerunner 55 is rated for up to 14 days, while the Forerunner 70 is rated for up to 13 days. That is the compromise behind the newer model’s richer AMOLED display: it leads in GPS recording but does not lead in everyday battery life.

Your charging habits matter more than the narrow difference. If you record long GPS sessions, the Forerunner 70 provides the larger buffer. If you mostly run shorter routes and dislike routine charging, the Forerunner 55 remains very competitive. On your wrist, neither feels like a dramatic endurance upgrade over the other.

Sports and activity profiles

The Forerunner 70 is considerably more flexible outside running because it includes 80+ built-in sports apps.

That wider selection suits mixed training. If your week moves between running, gym work and other activities, the newer watch is more likely to have an appropriate profile ready without forcing everything into a generic recording mode.

The Forerunner 55 covers the activities many beginners actually use: running, cycling, pool swimming, HIIT and Pilates are all represented. That is a sensible core for someone buying a first running watch rather than an all-purpose training log.

Do not pay for profile breadth merely because the headline sounds impressive. List what you genuinely do in a normal month. If those activities already sit inside the Forerunner 55’s selection, the Forerunner 70’s broader library will not change much; if your training constantly varies, you will encounter its advantage whenever you start an activity.

Navigation and satellite modes

The Forerunner 70 is the stronger choice for following planned routes because it supports an on-watch map and course navigation.

You can load a saved course and see the route on the watch as you follow it. That makes the newer model more useful when you are trying unfamiliar roads or paths and want guidance without repeatedly reaching for your phone.

Its satellite options are GPS Only and All Systems. The Forerunner 55 instead supports GPS, GLONASS and Galileo, but it does not include on-device courses or maps. It remains well suited to recording where you went; it is less helpful when the watch needs to tell you where to go next.

This distinction is easy to value. If most of your runs begin at home and follow familiar loops, navigation may sit unused. If you download routes, travel for events or enjoy exploring, the Forerunner 70 removes a practical reason to carry your phone in your hand.

Health tracking and sensors

The Forerunner 70 offers the broader health overview, although health hardware is not the main reason to choose between these watches.

Both use wrist-based heart rate and an accelerometer. The Forerunner 70 adds Pulse Ox blood-oxygen measurement, plus Sleep Coach, HRV Status and Health Status. These tools fit its wider theme: it tries to give you more context around recovery and your condition between sessions.

The Forerunner 55 tracks sleep, Body Battery and all-day stress. For a casual runner who wants a general view of energy and rest without turning every morning into a training decision, that remains a useful set.

The overlap matters. Neither watch wins simply because it can record heart rate from your wrist; both do that. You will notice the Forerunner 70’s advantage only if you regularly check its extra overnight and recovery views, which brings the decision back to how actively you use guidance between runs.

Fit, comfort and replacement straps

Both watches are compact running companions, but the Forerunner 55 is marginally smaller and lighter while sharing the same practical strap fitment as the Forerunner 70.

The Forerunner 70 measures 42.6 x 42.6 x 11.9 mm and weighs 40 g. The Forerunner 55 measures 42 x 42 x 11.6 mm and weighs 37 g. Those dimensions put them close together on the wrist, although the older model has the slight comfort edge if you are particularly sensitive to watch weight.

Fit is not just the case. Our catalogue fitment data confirms that both models take 20mm quick-release straps, so changing the material does not require a proprietary connector. We stock silicone, nylon, leather, milanese and metal options for both watches.

Silicone is the practical choice for sweat and pool sessions. Nylon can feel softer and more adjustable for long days, while leather, milanese and metal let a running watch look less sporty at work or over dinner. You can browse the full ranges of Garmin Forerunner 70 straps and Garmin Forerunner 55 straps.

What you will feel is not a major case-size gulf. The Forerunner 55 is the lighter option, but either watch can be tuned for exercise or all-day comfort with the same widely used quick-release strap size.

Smartwatch and safety features

The two watches are closely matched for core connected features, so smartwatch functions are not a strong reason to pay more.

Both show phone notifications, control music playing on a paired phone and support LiveTrack. Both also include Incident Detection alongside LiveTrack for supported safety and location-sharing situations.

This is an important genuine tie. The Forerunner 70’s AMOLED touchscreen may make notifications and menus more pleasant to view, but the listed feature set does not transform it into a fundamentally different type of smartwatch. Its meaningful advantages remain training feedback, course navigation and the broader activity selection.

If notifications, phone music controls and LiveTrack cover your needs, either watch does the job. In everyday use, you will notice the difference in how information is displayed, not a large gap in the core connected tools available.

Pool swimming and water resistance

Both watches suit pool swimming and carry the same 5 ATM water rating.

Each includes a Pool Swim activity and can record pool-focused information such as lengths, distance and pace. That makes either model useful for a runner who adds regular swim sessions without needing a separate pool watch.

The Forerunner 70’s much broader activity library still makes it the more flexible multisport companion overall. Yet for the specific job of alternating running with pool lengths, the Forerunner 55 already covers the requirement.

In the water, there is no decisive rating advantage. Your choice should return to training guidance and display preference rather than assuming the more expensive watch is inherently better for an ordinary pool session.

Is the Garmin Forerunner 70 worth paying more for?

Yes, the Forerunner 70 is worth paying more when you will use its readiness feedback, course navigation or brighter touchscreen; otherwise, the Forerunner 55 gives you the more economical route to dependable run tracking.

At the time of writing, the Garmin Forerunner 70 was listed at £219.99, while the Garmin Forerunner 55 was listed at £179.99. Retail promotions can narrow that gap, and a close discount makes the newer watch easier to justify because its extra training layer leaves more space for your running to develop.

At a clearer saving, the Forerunner 55 makes sense for simple pace, distance, heart-rate and route recording. You still receive Garmin Coach and Daily Suggested Workouts, so choosing it is about avoiding unused complexity rather than giving up all guidance.

If neither model quite matches your routine, our guide to which Garmin is right for you places the wider range around different activities and priorities. At checkout, the difference you are really funding with the Forerunner 70 is better decision support between runs, not merely a newer name.

Where the Garmin Forerunner 70 is better

The Forerunner 70 wins where richer guidance, display quality and activity flexibility affect regular use.

• Deeper training context: Training Load, Training Status and Training Readiness help turn recorded sessions into decisions about the next one.
• Brighter touch display: its 1.2-inch AMOLED touchscreen has a resolution of 390 x 390 pixels, while physical buttons remain available during exercise.
• Longer GPS recording: up to 23 hours gives it the edge for extended tracked sessions.
• Broader activity support: 80+ built-in sports apps make it better suited to varied training.
• Route guidance: its on-watch map and course navigation can guide you along saved routes.
• Wider recovery overview: HRV Status, Sleep Coach and Health Status complement its training tools.

Where the Garmin Forerunner 55 is better

The Forerunner 55 wins on price, simplicity and slight all-day comfort without losing the main tools a casual runner needs.

• Lower purchase price: the Forerunner 55 was listed at £179.99 at the time of writing.
• Longer smartwatch rating: up to 14 days edges the Forerunner 70’s quoted everyday battery life.
• Lighter case: its 37 g weight makes it the less noticeable option for sleep and all-day wear.
• Focused running tools: Daily Suggested Workouts, recovery time and PacePro cover useful guidance without presenting as much data.
• Core activity coverage: running, cycling, pool swimming, HIIT and Pilates meet the needs of many beginner routines.
• The same strap flexibility: its 20mm quick-release fitment supports silicone, nylon, leather, milanese and metal straps from our catalogue.

Who should choose which

Choose according to whether you want the watch to guide your training decisions or simply record your activity reliably.

• Choose the Garmin Forerunner 70 if you train to a plan and will use Training Readiness, Training Status or Training Load when deciding whether to push or recover.
• Choose the Garmin Forerunner 70 if you run unfamiliar routes and want to follow saved courses from your wrist.
• Choose the Garmin Forerunner 70 if everyday display quality matters and you want a brighter AMOLED touchscreen without losing button control.
• Choose the Garmin Forerunner 70 if your exercise is varied and its 80+ built-in sports apps match activities you genuinely record.
• Choose the Garmin Forerunner 55 if you mainly want reliable run tracking with pace, distance, heart-rate data and useful workout suggestions.
• Choose the Garmin Forerunner 55 if the saving matters more than course navigation, a touchscreen or deeper recovery feedback.
• Choose the Garmin Forerunner 55 if you prefer a lighter watch for continuous wear and are satisfied with button-only control.

For most new buyers, the Forerunner 70 is the more complete long-term choice; the Forerunner 55 remains the smarter value pick when running basics are genuinely enough.

Frequently asked questions

These answers cover the connected and edge-case features that may still affect your choice.

Can either watch play music through Bluetooth headphones without my phone?

Short answer: No. Both watches control music playing on a paired phone, but neither stores music for phone-free listening through Bluetooth headphones.

Can I reply to messages from either watch on an iPhone or Android phone?

Short answer: The Forerunner 70 can send preset SMS replies when paired with a compatible Android phone. Neither watch supports replying from an iPhone, and the Forerunner 55 displays notifications without on-watch message replies.

Does either watch support contactless payments?

Short answer: No. Neither the Forerunner 55 nor the Forerunner 70 has Garmin Pay contactless payments.

Can either watch track open-water swimming?

Short answer: No. Both watches are for pool swimming rather than open-water swim tracking.

Can I use a chest heart-rate monitor with either watch?

Short answer: Yes. Both watches can pair with a compatible chest heart-rate monitor using ANT+ or Bluetooth.